fix(*): update removeWords functionality to be case-insensitive

#50

Author: web-mech

lib/badwords.js

@@ -31,7 +31,7 @@ class Filter {
     return this.list
       .filter((word) => {
         const wordExp = new RegExp(`\\b${word.replace(/(\W)/g, '\\$1')}\\b`, 'gi');
-        return !this.exclude.includes(word) && wordExp.test(string);
+        return !this.exclude.includes(word.toLowerCase()) && wordExp.test(string);
       })
       .length > 0 || false;
   }
@@ -65,19 +65,21 @@ class Filter {
 
     this.list.push(...words);
 
-    words.forEach((word) => {
-      if (this.exclude.includes(word)) {
-        this.exclude.splice(this.exclude.indexOf(word), 1);
-      }
-    });
+    words
+      .map(word => word.toLowerCase())
+      .forEach((word) => {
+        if (this.exclude.includes(word)) {
+          this.exclude.splice(this.exclude.indexOf(word), 1);
+        }
+      });
   }
 
   /**
    * Add words to whitelist filter
    * @param {...string} word - Word(s) to add to whitelist.
    */
   removeWords() {
-    this.exclude.push(...Array.from(arguments));
+    this.exclude.push(...Array.from(arguments).map(word => word.toLowerCase()));
   }
 }