chore(changelog): add interface and i18n types, update tests

This adds extra types that Angular doesn't use. "interface" is for
frontend related changes etc. "i18n" means internationalization and
refers to translations, etc.

Fixes #2622.

validate-commit-msg.js

@@ -13,7 +13,7 @@ var fs = require('fs');
 var util = require('util');
 
 
-var MAX_LENGTH = 999;
+var MAX_LENGTH = 100;
 var PATTERN = /^(?:fixup!\s*)?(\w*)(\(([\w\$\.\-\*/]*)\))?\: (.*)$/;
 var IGNORED = /^WIP\:/;
 var TYPES = {
@@ -25,7 +25,9 @@ var TYPES = {
   perf: true,
   test: true,
   chore: true,
-  revert: true
+  revert: true,
+  'interface': true,
+  i18n: true
 };