update build plugins:

maven-compiler-plugin ............................ 3.13.0 -> 3.14.0
maven-enforcer-plugin .............................. 3.5.0 -> 3.6.1
maven-surefire-plugin .............................. 3.5.2 -> 3.5.3
org.codehaus.mojo:flatten-maven-plugin ............. 1.6.0 -> 1.7.2

Author: mofterdinger

pom.xml

@@ -74,7 +74,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.13.0</version>
+				<version>3.14.0</version>
 				<configuration>
 					<release>${jdk.version}</release>
 					<encoding>UTF-8</encoding>
@@ -95,7 +95,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-surefire-plugin</artifactId>
-				<version>3.5.2</version>
+				<version>3.5.3</version>
 				<configuration>
 					<failIfNoTests>true</failIfNoTests>
 				</configuration>
@@ -105,7 +105,7 @@
 			<plugin>
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>flatten-maven-plugin</artifactId>
-				<version>1.6.0</version>
+				<version>1.7.2</version>
 				<configuration>
 					<updatePomFile>true</updatePomFile>
 					<flattenMode>resolveCiFriendliesOnly</flattenMode>