Increase minimum Maven version to 3.8

Author: rjeberhard

pom.xml

@@ -631,7 +631,7 @@
     <maven.compiler.source>11</maven.compiler.source>
     <maven.compiler.target>11</maven.compiler.target>
     <java.version.range>11</java.version.range>
-    <maven.version.range>[3.5.2,)</maven.version.range>
+    <maven.version.range>[3.8,)</maven.version.range>
     <maven-enforcer-plugin-version>3.3.0</maven-enforcer-plugin-version>
     <maven-clean-plugin-version>3.3.1</maven-clean-plugin-version>
     <maven-compiler-plugin-version>3.11.0</maven-compiler-plugin-version>