Fix links for collection and string filters

Author: dimitriwalters

README.md

@@ -29,9 +29,9 @@
   - [omit](#omit)
   - [pick](#pick)
   - [pluck](#pluck)
-  - [reverse](#reverse-collection)
+  - [reverse](#reverse)
   - [remove](#remove)
-  - [removeWith](#remove-with)
+  - [removeWith](#removewith)
   - [searchField](#searchfield)
   - [some](#contains)
   - [toArray](#toarray)
@@ -41,7 +41,7 @@
 - [String](#string)
   - [endsWith](#endswith)
   - [repeat](#repeat)
-  - [reverse](#reverse-string)
+  - [reverse](#reverse-1)
   - [slugify](#slugify)
   - [startsWith](#startswith)
   - [stripTags](#striptags)