Merge branch 'master' of https://gitbox.apache.org/repos/asf/commons-cli.git

Author: garydgregory

.github/workflows/maven.yml

@@ -26,7 +26,7 @@ jobs:
         java: [ 8, 11, 14 ]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.1
     - name: Set up JDK ${{ matrix.java }}
       uses: actions/setup-java@v1
       with:

pom.xml

@@ -19,7 +19,7 @@
   <parent>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-parent</artifactId>
-    <version>48</version>
+    <version>51</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <groupId>commons-cli</groupId>