* fix(crystal): fix typos in Crystal templates
* fix(crystal): various fixes for partial_oneof_module.mustache Crystal template
1. `class << self` doesn't exist in Crystal, you must prefix class methods with `self.`
2. use double quotes for String litterals (simple quotes are for Char litterals)
3. global `private` keyword doesn't exist in Crystal, you must prefix private methods with `private`
4. you must specify types when using `each_with_object({})`
* fix(crystal): add isKeyInCookie in Crystal configuration.mustache
* fix(crystal): wrap `rescue` in a `begin`
* fix(crystal): use Spectator shard to run tests (`described_class` is not available in Crystal std lib)
* fix(crystal): dry tests
* fix(crystal): enable some API tests, mark others as pending
* fix(crystal): update samples
* fix(crystal): update sample app specs
* fix(crystal): install development dependencies
* [crystal] update crystal version 1.0.0
* [crystal] show crystal version on CI
* [crystal][client] $ shards update --ignore-crystal-version
* [crystal][client] update pom.xml
