change gradle version 2.12 -> 3.4

refactor

Author: host6

build.gradle

@@ -15,12 +15,12 @@ repositories {
 }
 
 dependencies {                                                            
-    compile 'com.github.ProjectKaiser:pk-vcs-api:master-SNAPSHOT'
-    compile 'org.eclipse.jgit:org.eclipse.jgit:4.3.0.201604071810-r'
-    
-    testCompile 'org.mockito:mockito-core:2.0.62-beta'
-    testCompile 'junit:junit:4.12'
-    testCompile 'com.github.ProjectKaiser:pk-vcs-test:master-SNAPSHOT'
+	compile 'com.github.ProjectKaiser:pk-vcs-api:master-SNAPSHOT'
+	compile 'org.eclipse.jgit:org.eclipse.jgit:4.3.0.201604071810-r'
+	
+	testCompile 'org.mockito:mockito-core:2.0.62-beta'
+	testCompile 'junit:junit:4.12'
+	testCompile 'com.github.ProjectKaiser:pk-vcs-test:master-SNAPSHOT'
 }
 
 task sourcesJar(type: Jar, dependsOn: classes) {

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.12-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.4-bin.zip