feat: update main gradle wrapper to 6.1.1

Author: gotev

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sun Jan 20 14:09:10 CET 2019
+#Sat Oct 31 11:07:16 CET 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip