Update dependency com.squareup.retrofit2:converter-gson to v2.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.squareup.retrofit2:converter-gson	2.5.0 -> 2.9.0

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Release Notes

square/retrofit

v2.9.0

Compare Source

• New: RxJava 3 adapter!

  The Maven coordinates are com.squareup.retrofit2:adapter-rxjava3.

  Unlike the RxJava 1 and RxJava 2 adapters, the RxJava 3 adapter's create() method will produce asynchronous HTTP requests by default. For synchronous requests use createSynchronous() and for synchronous on a scheduler use createWithScheduler(..).

v2.8.2

• Fix: Detect running on the Android platform by using system property rather than the presence of classes.
  This ensures that even when you're running on the JVM with Android classes present on the classpath you
  get JVM semantics.
• Fix: Update to OkHttp 3.14.9 which contains an associated Android platform detection fix.

v2.8.1

• Fix: Do not access MethodHandles.Lookup on Android API 24 and 25. The class is only available
  on Android API 26 and higher.

v2.8.0

• New: Add Call.timeout() which returns the okio.Timeout of the full call.
• Fix: Change Call.awaitResponse() to accept a nullable response type.
• Fix: Support default methods on Java 14+. We had been working around a bug in earlier versions of
  Java. That bug was fixed in Java 14, and the fix broke our workaround.

v2.7.2

• Fix: Update to OkHttp 3.14.7 for compatibility with Android R (API 30).

v2.7.1

• Fix: Support 'suspend' functions in services interfaces when using 'retrofit-mock' artifact.

v2.7.0

This release changes the minimum requirements to Java 8+ or Android 5+.
See this blog post for more information on the change.

• New: Upgrade to OkHttp 3.14.4. Please see its changelog for 3.x.
• Fix: Allow service interfaces to extend other interfaces.
• Fix: Ensure a non-null body is returned by Response.error.

v2.6.4

• Fix: Support 'suspend' functions in services interfaces when using 'retrofit-mock' artifact.

v2.6.3

• Fix: Change mechanism for avoiding UndeclaredThrowableException in rare cases from using yield
  an explicit dispatch which ensures that it will work even on dispatchers which do not support yielding.

v2.6.2

• Fix: Avoid IOExceptions being wrapped in UndeclaredThrowableException in rare cases when using
  Response<..> as a return type for Kotlin 'suspend' functions.

v2.6.1

• Fix: Avoid IOExceptions being wrapped in UndeclaredThrowableException in rare cases.
• Fix: Include no-content ResponseBody for responses created by Response.error.
• Fix: Update embedded R8/ProGuard rules to not warn about nested classes used for Kotlin extensions.

v2.6.0

• New: Support suspend modifier on functions for Kotlin! This allows you to express the asynchrony of HTTP requests
  in an idiomatic fashion for the language.

  @​GET("users/{id}")
  suspend fun user(@​Path("id") id: Long): User

  Behind the scenes this behaves as if defined as fun user(...): Call<User> and then invoked with Call.enqueue.
  You can also return Response<User> for access to the response metadata.

  Currently this integration only supports non-null response body types. Follow
  issue 3075 for nullable type support.

• New: @Tag parameter annotation for setting tags on the underlying OkHttp Request object. These can be read
  in CallAdapters or OkHttp Interceptors for tracing, analytics, varying behavior, and more.

• New: @SkipCallbackExecutor method annotation will result in your Call invoking its Callback on the
  background thread on which the HTTP call was made.

• New: Support OkHttp's Headers type for @HeaderMap parameters.

• New: Add Retrofit.Builder.baseUrl(URL) overload.

• Fix: Add embedded R8/ProGuard rule which retains Retrofit interfaces (while still allowing obfuscation). This
  is needed because R8 running in 'full mode' (i.e., not in ProGuard-compatibility mode) will see that there are
  no subtypes of these interfaces and rewrite any code which references instances to null.

• Fix: Mark HttpException.response() as @Nullable as serializing the exception does not retain this instance.

• Fix: Fatal errors (such as stack overflows, out of memory, etc.) now propagate to the OkHttp Dispatcher thread
  on which they are running.

• Fix: Ensure JAX-B converter closes the response body when an exception is thrown during deserialization.

• Fix: Ignore static methods when performing eager validation of interface methods.

• Fix: Ensure that calling source() twice on the ResponseBody passed to a Converter always returns the same
  instance. Prior to the fix, intermediate buffering would cause response data to be lost.

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