Update specs2-core to 4.20.9 (#643) · apache/pekko-http@93d3dc8

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Compile everything: parsing/src/main/scala-2/org/apache/pekko/http/ccompat/pre213macro.scala#L17

Unused import

Compile everything: parsing/src/main/scala-2/org/apache/pekko/http/ccompat/since213macro.scala#L17

Unused import

Compile everything: http-scalafix/scalafix-rules/src/main/scala/org/apache/pekko/http/fix/MigrateToServerBuilder.scala#L31

method args in trait Apply is deprecated: 4.6.0

Compile everything: http-scalafix/scalafix-rules/src/main/scala/org/apache/pekko/http/fix/MigrateToServerBuilder.scala#L45

method args in trait Apply is deprecated: 4.6.0

Compile everything: http-core/src/main/scala/org/apache/pekko/http/javadsl/ConnectionContext.scala#L63

Prefer the Scala annotation over Java's `@Deprecated` to provide a message and version: @deprecated("message", since = "MyLib 1.0")

Compile everything: http-core/src/main/scala/org/apache/pekko/http/javadsl/ConnectionContext.scala#L70

Prefer the Scala annotation over Java's `@Deprecated` to provide a message and version: @deprecated("message", since = "MyLib 1.0")

Compile everything: http-core/src/main/scala/org/apache/pekko/http/javadsl/ConnectionContext.scala#L89

Prefer the Scala annotation over Java's `@Deprecated` to provide a message and version: @deprecated("message", since = "MyLib 1.0")

Compile everything: http-core/src/main/scala/org/apache/pekko/http/javadsl/ConnectionContext.scala#L113

Prefer the Scala annotation over Java's `@Deprecated` to provide a message and version: @deprecated("message", since = "MyLib 1.0")

Compile everything: http-core/src/main/scala/org/apache/pekko/http/javadsl/ConnectionContext.scala#L129

Prefer the Scala annotation over Java's `@Deprecated` to provide a message and version: @deprecated("message", since = "MyLib 1.0")

Compile everything: http-core/src/main/scala/org/apache/pekko/http/javadsl/ConnectionContext.scala#L133

Prefer the Scala annotation over Java's `@Deprecated` to provide a message and version: @deprecated("message", since = "MyLib 1.0")

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