Rewrote key generator tests, fixed vowels

-Tests were not brought up to date with some updates that were done to key generator modules.
-Apparently original creator had no idea that 'y' is a vowel; fixed this issue and reflected changes in actual files.

lib/key_generators/dictionary.js

@@ -3,21 +3,22 @@ const fs = require('fs');
 
 module.exports = class DictionaryGenerator {
 
-	constructor({ path } = {}, readyCallback){
+	constructor({ path } = {}){
 		//check for dictionary path
 		if (!path){
-			winston.error('No dictionary path specified in options');
-			process.exit(1);
+			let error = 'No dictionary path specified in options';
+			winston.error(error);
+			throw error;
 		}
 
 		//load dictionary
 		if (!fs.existsSync(path)){
-			winston.error(`Dictionary file "${path}" doesn't exist`);
-			process.exit(1);
+			let error = `Dictionary file "${path}" doesn't exist`;
+			winston.error(error);
+			throw error;
 		}
 
 		this.dictionary = fs.readFileSync(path).toString().split(/\s+/gm);
-		if (readyCallback) readyCallback();
 	}
 
 	// Generates a dictionary-based key, of keyLength words

lib/key_generators/phonetic.js

@@ -1,18 +1,20 @@
 //inspiration from pwgen and https://tools.arantius.com/password
 
-//helper function to get a random consonant / vowel
+//helper function to get a random array element
 function randArray(collection){
 	return collection[ Math.floor(Math.random() * collection.length) ];
 }
 
-const vovels = 'aeiou';
-const consonants = 'bcdfghjklmnpqrstvwxyz';
+const vovels = 'aeiouy';
+const consonants = 'bcdfghjklmnpqrstvwxz';
 
 module.exports = class PhoneticKeyGenerator {
 	//generate a phonetic key consisting of random consonant & vowel
 	createKey(keyLength){
 		let text = '';
 		const start = Math.floor(Math.random() * 2);
+		//start == 0 - starts with consonant
+		//start == 1 - starts with vovel
 
 		for (let i = 0; i < keyLength; i++){
 			text += randArray(i % 2 == start ? consonants : vovels);