Merge cases (#1188)

Merged cases that do the same job
Returning a single token that matches with case
Can be solved easily by converting the ASCII back to a character using String.fromCharCode

lib/tokenize.es6

@@ -85,27 +85,14 @@ export default function tokenizer (input, options = {}) {
         break
 
       case OPEN_SQUARE:
-        currentToken = ['[', '[', line, pos - offset]
-        break
-
       case CLOSE_SQUARE:
-        currentToken = [']', ']', line, pos - offset]
-        break
-
       case OPEN_CURLY:
-        currentToken = ['{', '{', line, pos - offset]
-        break
-
       case CLOSE_CURLY:
-        currentToken = ['}', '}', line, pos - offset]
-        break
-
       case COLON:
-        currentToken = [':', ':', line, pos - offset]
-        break
-
       case SEMICOLON:
-        currentToken = [';', ';', line, pos - offset]
+      case CLOSE_PARENTHESES:
+        let controlChar = String.fromCharCode(code)
+        currentToken = [controlChar, controlChar, line, pos - offset]
         break
 
       case OPEN_PARENTHESES:
@@ -159,10 +146,6 @@ export default function tokenizer (input, options = {}) {
 
         break
 
-      case CLOSE_PARENTHESES:
-        currentToken = [')', ')', line, pos - offset]
-        break
-
       case SINGLE_QUOTE:
       case DOUBLE_QUOTE:
         quote = code === SINGLE_QUOTE ? '\'' : '"'