Kotlin multiplatform auth (#4284)

* Includes support for the Javascript platform

* Fixes enum serialization with non-string values

* Updates to expose api dependencies to consumers

* Uses explicit class name for Kotlin collection classes

* Maps unknown object type to Kotlin String

The Kotlinx serialization library uses reflectionless serialization and
requires compile-time serialization declarations. As a result, unknown
objects are mapped to Kotlin String instances to enable compilation
where object types are not explicitly defined.

* Improves support for binary objects

Previously, objects that contained binary data were assigned the
InputProvider data type. This was suitable for a binary input form
parameter, but unsuitable for Base64 or octet binary strings. These
binary strings are now assigned a more suitable object.

* Includes Kotlin Multiplatform auth classes

Includes support for:
- api key
- http basic
- http bearer
- oauth (partial support)

https://github.com/OpenAPITools/openapi-generator/issues/4283

* Updates Kotlin samples

samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -36,7 +36,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     */
     fun addPet(body: Pet) : Unit {
         val localVariableBody: kotlin.Any? = body
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.POST,
@@ -67,7 +67,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     */
     fun deletePet(petId: kotlin.Long, apiKey: kotlin.String?) : Unit {
         val localVariableBody: kotlin.Any? = null
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf("api_key" to apiKey.toString())
         val localVariableConfig = RequestConfig(
             RequestMethod.DELETE,
@@ -166,7 +166,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     @Suppress("UNCHECKED_CAST")
     fun getPetById(petId: kotlin.Long) : Pet {
         val localVariableBody: kotlin.Any? = null
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.GET,
@@ -196,7 +196,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     */
     fun updatePet(body: Pet) : Unit {
         val localVariableBody: kotlin.Any? = body
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.PUT,
@@ -228,7 +228,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     */
     fun updatePetWithForm(petId: kotlin.Long, name: kotlin.String?, status: kotlin.String?) : Unit {
         val localVariableBody: kotlin.Any? = mapOf("name" to "$name", "status" to "$status")
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf("Content-Type" to "")
         val localVariableConfig = RequestConfig(
             RequestMethod.POST,
@@ -261,7 +261,7 @@ class PetApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCli
     @Suppress("UNCHECKED_CAST")
     fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: java.io.File?) : ApiResponse {
         val localVariableBody: kotlin.Any? = mapOf("additionalMetadata" to "$additionalMetadata", "file" to "$file")
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf("Content-Type" to "")
         val localVariableConfig = RequestConfig(
             RequestMethod.POST,

samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/apis/StoreApi.kt

@@ -35,7 +35,7 @@ class StoreApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiC
     */
     fun deleteOrder(orderId: kotlin.String) : Unit {
         val localVariableBody: kotlin.Any? = null
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.DELETE,
@@ -65,7 +65,7 @@ class StoreApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiC
     @Suppress("UNCHECKED_CAST")
     fun getInventory() : kotlin.collections.Map<kotlin.String, kotlin.Int> {
         val localVariableBody: kotlin.Any? = null
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.GET,
@@ -96,7 +96,7 @@ class StoreApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiC
     @Suppress("UNCHECKED_CAST")
     fun getOrderById(orderId: kotlin.Long) : Order {
         val localVariableBody: kotlin.Any? = null
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.GET,
@@ -127,7 +127,7 @@ class StoreApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiC
     @Suppress("UNCHECKED_CAST")
     fun placeOrder(body: Order) : Order {
         val localVariableBody: kotlin.Any? = body
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.POST,

samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/apis/UserApi.kt

@@ -35,7 +35,7 @@ class UserApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCl
     */
     fun createUser(body: User) : Unit {
         val localVariableBody: kotlin.Any? = body
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.POST,
@@ -65,7 +65,7 @@ class UserApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCl
     */
     fun createUsersWithArrayInput(body: kotlin.Array<User>) : Unit {
         val localVariableBody: kotlin.Any? = body
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.POST,
@@ -95,7 +95,7 @@ class UserApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCl
     */
     fun createUsersWithListInput(body: kotlin.Array<User>) : Unit {
         val localVariableBody: kotlin.Any? = body
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.POST,
@@ -125,7 +125,7 @@ class UserApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCl
     */
     fun deleteUser(username: kotlin.String) : Unit {
         val localVariableBody: kotlin.Any? = null
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.DELETE,
@@ -156,7 +156,7 @@ class UserApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCl
     @Suppress("UNCHECKED_CAST")
     fun getUserByName(username: kotlin.String) : User {
         val localVariableBody: kotlin.Any? = null
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.GET,
@@ -221,7 +221,7 @@ class UserApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCl
     */
     fun logoutUser() : Unit {
         val localVariableBody: kotlin.Any? = null
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.GET,
@@ -252,7 +252,7 @@ class UserApi(basePath: kotlin.String = "http://petstore.swagger.io/v2") : ApiCl
     */
     fun updateUser(username: kotlin.String, body: User) : Unit {
         val localVariableBody: kotlin.Any? = body
-        val localVariableQuery: MultiValueMap = mapOf()
+        val localVariableQuery: MultiValueMap = mutableMapOf()
         val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
         val localVariableConfig = RequestConfig(
             RequestMethod.PUT,

samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt

@@ -1,6 +1,6 @@
 package org.openapitools.client.infrastructure
 
-typealias MultiValueMap = Map<String,List<String>>
+typealias MultiValueMap = MutableMap<String,List<String>>
 
 fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","

samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/RequestConfig.kt

@@ -12,5 +12,5 @@ data class RequestConfig(
     val method: RequestMethod,
     val path: String,
     val headers: MutableMap<String, String> = mutableMapOf(),
-    val query: Map<String, List<String>> = mapOf()
+    val query: MutableMap<String, List<String>> = mutableMapOf()
 )