Update gradle to 6.4.1, update dependencies.

gradle/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-  id 'com.github.spotbugs' version '4.0.8'
+  id 'com.github.spotbugs' version '4.2.0'
   id 'com.github.ben-manes.versions' version '0.28.0'
 }
 

gradle/dependencies.gradle

@@ -31,5 +31,5 @@ libraries.junit = 'junit:junit:4.13'
 libraries.mockito = 'org.mockito:mockito-core:3.3.3'
 
 // check libraries
-libraries.spotbugs_annotations = 'com.github.spotbugs:spotbugs-annotations:4.0.2'
+libraries.spotbugs_annotations = 'com.github.spotbugs:spotbugs-annotations:4.0.3'
 

gradle/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradle/gradlew

@@ -82,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -129,6 +130,7 @@ fi
 if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath

gradle/gradlew.bat

@@ -84,6 +84,7 @@ set CMD_LINE_ARGS=%*
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
 "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%