MPATCH-20 use generics on new code

src/main/java/org/apache/maven/plugin/patch/ApplyMojo.java

diff --git a/src/main/java/org/apache/maven/plugin/patch/ApplyMojo.java b/src/main/java/org/apache/maven/plugin/patch/ApplyMojo.java
index b8117b2..d253a79 100644
--- a/src/main/java/org/apache/maven/plugin/patch/ApplyMojo.java
+++ b/src/main/java/org/apache/maven/plugin/patch/ApplyMojo.java
@@ -246,7 +246,7 @@
      * @since 1.3
      */
     @Parameter
-    private List excludes;
+    private List<String> excludes;
 
     /**
      * Apply the patches. Give preference to patchFile over patchSourceDir/patches, and preference to originalFile over