Bump jgit version (#56)

Author: jeremyjliu

build.gradle

@@ -17,7 +17,7 @@ repositories {
 
 dependencies {
     compile gradleApi()
-    compile 'org.eclipse.jgit:org.eclipse.jgit:4.1.1.201511131810-r'
+    compile 'org.eclipse.jgit:org.eclipse.jgit:4.5.2.201704071617-r'
 
     testCompile gradleTestKit()
     testCompile('org.spockframework:spock-core:1.0-groovy-2.4') {