Update Gradle wrapper, dependencies. Kotlin compile to Java 1.8 target

Author: leventov

build.gradle

@@ -15,15 +15,15 @@
  */
 
 buildscript {
-    ext.kotlin_version = '1.3.0'
+    ext.kotlin_version = '1.3.61'
 
     repositories {
         mavenCentral()
     }
 
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath 'ru.vyarus:gradle-animalsniffer-plugin:1.4.6'
+        classpath 'ru.vyarus:gradle-animalsniffer-plugin:1.5.0'
     }
 }
 
@@ -57,19 +57,18 @@ subprojects {
 
         // For Animal Sniffer
         if (project.name != 'gradle-plugin') {
-            signature 'org.codehaus.mojo.signature:java17:1.0@signature'
+            signature 'org.codehaus.mojo.signature:java18:1.0@signature'
         }
     }
 
-    def targetVersion = project.name != 'gradle-plugin' ? '1.7' : '1.8'
     compileJava {
-        sourceCompatibility = targetVersion
-        targetCompatibility = targetVersion
+        sourceCompatibility = '1.8'
+        targetCompatibility = '1.8'
     }
 
     compileKotlin {
         kotlinOptions {
-            jvmTarget = '1.6'
+            jvmTarget = '1.8'
         }
     }
 

gradle/wrapper/gradle-wrapper.jar

@@ -1,22 +1,5 @@
-#
-# Copyright 2014-2019 the original author or authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-#Tue Nov 06 17:37:01 CET 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.0-rc-1-all.zip