Merge pull request #24 from Tinder/propogate_exit_code

Propogate error code

Author: tinder-maxwellelliott

src/main/java/com/bazel_diff/VersionProvider.java

@@ -5,7 +5,7 @@
 class VersionProvider implements IVersionProvider {
     public String[] getVersion() throws Exception {
         return new String[] {
-            "1.1.1"
+            "1.2.0"
         };
     }
 }

src/main/java/com/bazel_diff/main.java

@@ -208,6 +208,7 @@ public Integer call() throws IOException {
     }
 
     public static void main(String[] args) {
-        new CommandLine(new BazelDiff()).execute(args);
+        int exitCode = new CommandLine(new BazelDiff()).execute(args);
+        System.exit(exitCode);
     }
 }