Upgrading several maven plugins. (#213)

- The maven-enforcer-plugin had an API incompatibility that might be fixed with a version upgrade.
- Several other plugins were out-of-date, and worth upgrading.
- Some plugins were not upgraded out of concern that they might break the build.

Author: sembler

code_gen/pom.xml

@@ -43,24 +43,24 @@
                 <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
                 <plugin>
                     <artifactId>maven-clean-plugin</artifactId>
-                    <version>3.1.0</version>
+                    <version>3.2.0</version>
                 </plugin>
                 <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
                 <plugin>
                     <artifactId>maven-resources-plugin</artifactId>
-                    <version>3.0.2</version>
+                    <version>3.2.0</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.8.0</version>
+                    <version>3.10.1</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-surefire-plugin</artifactId>
                     <version>2.22.1</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-jar-plugin</artifactId>
-                    <version>3.0.2</version>
+                    <version>3.2.2</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-install-plugin</artifactId>

library/pom.xml

@@ -98,7 +98,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.3</version>
+                <version>3.10.1</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
@@ -111,7 +111,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-enforcer-plugin</artifactId>
-                <version>1.4</version>
+                <version>3.1.0</version>
                 <executions>
                     <execution>
                         <id>enforce-java</id>
@@ -131,14 +131,14 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.10.3</version>
+                <version>3.4.0</version>
                 <configuration>
                 </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>2.4</version>
+                <version>3.2.2</version>
                 <configuration>
                     <archive>
                         <manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
@@ -154,7 +154,7 @@
             <plugin>
                 <groupId>org.apache.felix</groupId>
                 <artifactId>maven-bundle-plugin</artifactId>
-                <version>2.5.0</version>
+                <version>5.1.6</version>
                 <executions>
                     <execution>
                         <id>bundle-manifest</id>
@@ -220,7 +220,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>1.6</version>
+                        <version>3.0.1</version>
                         <executions>
                             <execution>
                                 <id>sign-artifacts</id>

website/pom.xml

@@ -45,7 +45,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.1</version>
+                <version>3.10.1</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>