[bugfix] Restore Java 7 build compatibility; officially we still support Java 7

Author: adamretter

csv-validator-core/pom.xml

@@ -157,7 +157,7 @@
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
-            <version>2.11.0</version>
+            <version>2.6</version>
         </dependency>
         <dependency>
             <groupId>org.specs2</groupId>

csv-validator-parent/pom.xml

@@ -110,7 +110,7 @@
                 <plugin>
                     <groupId>net.alchim31.maven</groupId>
                     <artifactId>scala-maven-plugin</artifactId>
-                    <version>4.4.0</version>
+                    <version>3.4.6</version>
                 </plugin>
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
@@ -150,7 +150,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-javadoc-plugin</artifactId>
-                    <version>3.3.2</version>
+                    <version>3.2.0</version>
                 </plugin>
                 <plugin>
                     <groupId>org.codehaus.mojo</groupId>