Release v5.0.0-beta.0: Switch to SDK generated with openapi-generator

.gitattributes

@@ -1,7 +1,9 @@
 # Ignore dev/testing files for distribution builds
-/tests export-ignore
+/test export-ignore
 .gitattributes export-ignore
 .gitignore export-ignore
 phpunit.xml export-ignore
+phpunit.xml.dist export-ignore
+phpstan.neon export-ignore
 CODEOWNERS export-ignore
 repository.json export-ignore

.gitignore

@@ -1,6 +1,17 @@
-# System, IDE, misc
-.DS_Store
-.idea
-.vscode
-composer.*
-vendor
+# ref: https://github.com/github/gitignore/blob/master/Composer.gitignore
+
+composer.phar
+/vendor/
+
+# Commit your application's lock file https://getcomposer.org/doc/01-basic-usage.md#commit-your-composer-lock-file-to-version-control
+# You may choose to ignore a library lock file http://getcomposer.org/doc/02-libraries.md#lock-file
+composer.lock
+
+# php-cs-fixer cache
+.php_cs.cache
+
+# PHPUnit cache
+.phpunit.result.cache
+
+# IDE
+.idea

.openapi-generator-ignore

@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md