Bump com.squareup.retrofit2.version from 2.3.0 to 2.7.0

[dependabot-preview]

Bumps com.squareup.retrofit2.version from 2.3.0 to 2.7.0.

Updates retrofit from 2.3.0 to 2.7.0

Changelog

Sourced from retrofit's changelog.

Version 2.7.0 (2019-12-09)

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.

Version 2.6.3 (2019-12-09)

• 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.

Version 2.6.2 (2019-09-23)

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

Version 2.6.1 (2019-07-31)

• 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.

Version 2.6.0 (2019-06-05)

• 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.

... (truncated)

Commits

• See full diff in compare view

Updates converter-jackson from 2.3.0 to 2.7.0

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Superseded by #8.