Remove confirmation values filter

Use 'y' and 'N' instead of filtering them to booleans as the filtered
value is printed to the console and is confusing is differs from the one
user typed.

translations.js

@@ -137,10 +137,10 @@ const run = () => {
       return confirmTranslation(targetLang, key, translation);
     })
     .then(answers => {
-      // a bool value if translation addition is confirmed
+      // 'y' or 'N'
       const confirmation = answers.value;
 
-      if (!confirmation) {
+      if (confirmation === 'N') {
         console.log('Discarding new translation');
         throw new BreakSignal();
       }
@@ -237,7 +237,7 @@ const addTranslation = (targetLang, key, source) => {
  * @param {String} key Key for the new translation
  * @param {Object} source Source language translations
  *
- * @return a Promise with the answers hash containing a boolean value field
+ * @return a Promise with with answers.value being 'y' or 'N'
  */
 const confirmTranslation = (targetLang, key, translation) => {
   return inquirer.prompt([
@@ -247,8 +247,7 @@ const confirmTranslation = (targetLang, key, translation) => {
       message: `Do you want to add the ${targetLangName(targetLang)} translation ${chalk.green(
         translation
       )} for the key ${chalk.blueBright(key)}? (y/N)`,
-      filter: value => (value === 'y' ? true : value === 'N' ? false : value),
-      validate: value => value === true || value === false,
+      validate: value => value === 'y' || value === 'N',
     },
   ]);
 };