Set maven wrapper to use maven v3.8.1 (#525)

* Bump maven-compiler-plugin to v3.8.1
* Bump jacoco-maven-plugin to v0.8.6
* Bump maven-filtering to v3.2.0

.mvn/wrapper/maven-wrapper.properties

@@ -1,2 +1,2 @@
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.1/apache-maven-3.8.1-bin.zip
 wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

CHANGELOG.adoc

@@ -31,6 +31,7 @@ Maintenance::
   * Rewrite `AsciidoctorDoxiaParserTest` to Java + remove Groovy & Spock configurations (#519)
   * Upgrade tests to JUni5 (#521)
   * Rename main branch (#524)
+  * Set maven wrapper to use maven v3.8.1 (#525)
 
 == v2.1.0 (2020-09-15)
 

pom.xml

@@ -63,11 +63,11 @@
         <asciidoctorj.version>2.4.1</asciidoctorj.version>
         <jruby.version>9.2.13.0</jruby.version>
         <maven.coveralls.plugin.version>4.3.0</maven.coveralls.plugin.version>
-        <maven.jacoco.plugin.version>0.8.5</maven.jacoco.plugin.version>
+        <maven.jacoco.plugin.version>0.8.6</maven.jacoco.plugin.version>
         <maven.plugin.plugin.version>3.5</maven.plugin.plugin.version>
         <maven.project.version>3.0.5</maven.project.version>
-        <maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
-        <maven.filtering.version>3.1.1</maven.filtering.version>
+        <maven.compiler.plugin.version>3.8.1</maven.compiler.plugin.version>
+        <maven.filtering.version>3.2.0</maven.filtering.version>
         <plexus.utils.version>3.0.23</plexus.utils.version>
         <plexus.component.metadata.version>1.7</plexus.component.metadata.version>
         <netty.version>4.1.59.Final</netty.version>