add create module

ts/smartstring.create.ts

@@ -0,0 +1,13 @@
+import * as plugins from './smartstring.plugins'
+
+export let createRandomString = (
+  patternArg: string,
+  lengthArg: number,
+  optionsArg: any
+): string => {
+  return plugins.randomatic(patternArg, lengthArg, optionsArg)
+}
+
+export let createCryptoRandomString = (lengthArg): string => {
+  return plugins.cryptoRandomString(lengthArg)
+}