Update Maven plugin dependency versions (#129)

- central-publishing-maven-plugin to 0.8.0
- maven-enforcer-plugin to 3.6.1
- maven-gpg-plugin to 3.2.8
- maven-javadoc-plugin to 3.11.3

Author: kevinherron

pom.xml

@@ -58,16 +58,16 @@
     <junit.version>5.13.4</junit.version>
 
     <!-- Plugin Dependencies -->
-    <central-publishing-maven-plugin.version>0.7.0</central-publishing-maven-plugin.version>
+    <central-publishing-maven-plugin.version>0.8.0</central-publishing-maven-plugin.version>
     <checkstyle.version>11.0.0</checkstyle.version>
     <maven-checkstyle-plugin.version>3.6.0</maven-checkstyle-plugin.version>
     <maven-compiler-plugin.version>3.14.0</maven-compiler-plugin.version>
     <maven-deploy-plugin.version>3.1.4</maven-deploy-plugin.version>
-    <maven-enforcer-plugin.version>3.5.0</maven-enforcer-plugin.version>
-    <maven-gpg-plugin.version>3.2.7</maven-gpg-plugin.version>
+    <maven-enforcer-plugin.version>3.6.1</maven-enforcer-plugin.version>
+    <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
     <maven-install-plugin.version>3.1.4</maven-install-plugin.version>
     <maven-jar-plugin.version>3.4.2</maven-jar-plugin.version>
-    <maven-javadoc-plugin.version>3.11.2</maven-javadoc-plugin.version>
+    <maven-javadoc-plugin.version>3.11.3</maven-javadoc-plugin.version>
     <maven-release-plugin.version>3.1.1</maven-release-plugin.version>
     <maven-resources-plugin.version>3.3.1</maven-resources-plugin.version>
     <maven-source-plugin.version>3.3.1</maven-source-plugin.version>