rename cleanStatic cache to be more relevant for both caches

Author: AndrewFarley

index.js

@@ -100,10 +100,10 @@ class ServerlessPythonRequirements {
               'install',
             ],
           },
-          cleanStatic: {
-            usage: 'Removes all items in the static cache (if present)',
+          cleanCache: {
+            usage: 'Removes all items in the pip download/static cache (if present)',
             lifecycleEvents: [
-              'cleanStatic',
+              'cleanCache',
             ],
           },
         },
@@ -131,7 +131,7 @@ class ServerlessPythonRequirements {
       return BbPromise.resolve();
     };
 
-    const cleanStatic = () => BbPromise.bind(this)
+    const cleanCache = () => BbPromise.bind(this)
       .then(cleanupCache);
 
 
@@ -143,7 +143,7 @@ class ServerlessPythonRequirements {
       'after:deploy:function:packageFunction': after,
       'requirements:install:install': before,
       'requirements:clean:clean': clean,
-      'requirements:cleanStatic:cleanStatic': cleanStatic,
+      'requirements:cleanCache:cleanCache': cleanCache,
     };
   }
 }