* Add scalafix plugin for jdk 9.
* Add command alias sortImports.
* Excludes some sources from SortImports.
* Update SortImports to 0.4.0
* Sort imports with `sortImports` command.
* Config to exclude class prefix from serialize-messages, #24273
* Adding no-serialization-verification-needed-class-prefix, with "akka." included
by default
* This is important now when we disable Java serialization by default.
There will be many complaints about Akka internal classes that are not marked with
NoSerializationVerificationNeeded, and we can't really sprinkle that everywhere.
* Not removing NoSerializationVerificationNeeded usage in Akka classes because that
may break bin compat, even though it's needed any more.
* fix DisabledJavaSerializerWarningSpec
This doesn't change the fact that the FJP in JDK 11 is less fair but makes the test pass:
* Disable serialize messages to make each message processing less CPU-intense
* Tune the throughput down to the default (was a very high value, 100), so less messages are worked through in one batch of internal dispatch.
* ⇒, →, ←
* because we don't want to show them in documentation snippets and
then it's complicated to avoid that when snippets are
located in src/test/scala in individual modules
* dont replace object `→` in FSM.scala and PersistentFSM.scala
* Add CopyrightHeader support for sbt-boilerplate plugin.
* Add CopyrightHeader support for `*.proto` files.
* Add regex match for both `–` and `-` for CopyrightHeader.
* Add CopyrightHeader support for sbt build files.
* Update copyright from 2018 to 2019.