1.11

• Updated Gradle to 5.6.3.
• Source and build compatibility switched to Java 7
• Bumped msg-simple to 1.2
• Bumped Guava to 28.1-android, and cleaned up a bunch of deprecated uses.
• Added serialVersionUID to JsonPointerException (commit 4ca60d2)
• Replaced OSGi plugin with biz.aQute.bnd. (commit 8bee295)