feat(core): update gradle to 3.4

Author: kucharzyk

gradle/wrapper/gradle-wrapper.jar

@@ -1,5 +1,6 @@
+#Thu Feb 23 18:50:34 CET 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.4-bin.zip