Upgrade to Gradle 4.5.1 (#831)

Author: valfirst

build.gradle

@@ -192,7 +192,7 @@ uploadArchives {
     }
 }
 
-wrapper.gradleVersion = '4.4.1'
+wrapper.gradleVersion = '4.5.1'
 
 test {
     useJUnit()

gradle/wrapper/gradle-wrapper.jar

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-bin.zip