add 3 tests, prettyBytes, primes & reducedFilter

updated prettyBytes example to output string

test/primes/primes.test.js

@@ -5,6 +5,7 @@ test('Testing primes', (t) => {
 	//For more information on all the methods supported by tape
 	//Please go to https://github.com/substack/tape
 	t.true(typeof primes === 'function', 'primes is a Function');
+	t.deepEqual(primes(10), [2, 3, 5, 7], "Generates primes up to a given number, using the Sieve of Eratosthenes.");
 	//t.deepEqual(primes(args..), 'Expected');
 	//t.equal(primes(args..), 'Expected');
 	//t.false(primes(args..), 'Expected');