Various scala-2.13.0-M5 fixes

Clearer imports in TcpDnsClient

Accept SVG's when checking if diagrams were generated

Fix akka-actor MiMa issues

akka-testkit scalafix changes

Update scalatest to 2.13-released snapshot

akka-stream scalafix changes

Update ssl-config

To version that's released with -M5

Take elements directly out of buffer

Manually fix immutable.Seq / Doc link

Make sure the right Concat, Sink is imported

akka-stream binary compat

akka-stream-testkit scalafix

akka-actor-tests scalafix

Eta-expensions

akka-actor-tests/src/test/scala/akka/pattern/RetrySpec.scala

@@ -68,7 +68,7 @@ class RetrySpec extends AkkaSpec with RetrySupport {
       }
 
       val retried = retry(
-        attempt,
+        () ⇒ attempt,
         10,
         100 milliseconds
       )
@@ -89,7 +89,7 @@ class RetrySpec extends AkkaSpec with RetrySupport {
       }
 
       val retried = retry(
-        attempt,
+        () ⇒ attempt,
         5,
         100 milliseconds
       )