Update 'google-java-format' 1.7 -> 1.9 (#66)

Author: zziga

README.md

@@ -6,6 +6,11 @@
 A maven plugin that automatically deploys [google-java-format](https://github.com/google/google-java-format) code formatter as a `pre-commit` git hook.
 On commit, the hook will automatically format staged java files.
 
+### Breaking changes between 2.x and 3.x
+
+* [#64](https://github.com/Cosium/git-code-format-maven-plugin/issues/64) `google-java-format 1.8` [dropped support for java 8](https://github.com/google/google-java-format/releases/tag/google-java-format-1.8).
+  The minimum supported runtime version for the plugin is JDK 11.
+
 ### Breaking changes between 1.x and 2.x
 
 * [#37](https://github.com/Cosium/git-code-format-maven-plugin/issues/37) To prevent conflicts with other plugins all keys are now 

pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>com.cosium.code</groupId>
   <artifactId>git-code-format-maven-plugin</artifactId>
-  <version>2.8-SNAPSHOT</version>
+  <version>3.0-SNAPSHOT</version>
   <packaging>maven-plugin</packaging>
 
   <name>Git Code Format Maven Plugin</name>
@@ -40,7 +40,7 @@
     <dependency>
       <groupId>com.google.googlejavaformat</groupId>
       <artifactId>google-java-format</artifactId>
-      <version>1.7</version>
+      <version>1.9</version>
     </dependency>
     <dependency>
       <groupId>org.eclipse.jgit</groupId>