Autocorrect: No invocations or nesting in string templates

[coolaj86]

This can be enforced by syntax and automatically corrected by tooling:

Bad Examples

let username = `test+${Crypto._randomBytes(16)}`;

let username = `test+${Crypto._randomBytes(`${getBase()}`)}`;

Good Examples

let rnd = Crypto._randomBytes(16);
let username = `test+${rnd}`;

let base = getBase();
let rnd = Crypto._randomBytes(16, `base${base}`);
let username = `test+${rnd}`;

Tooling Example

let AUTO_STR_157 = Crypto._randomBytes(16);
let username = `test+${AUTO_STR_157}`;

let AUTO_STR_156 = getBase();
let AUTO_STR_157 = Crypto._randomBytes(16, `base${AUTO_STR_156}`);
let username = `test+${AUTO_STR_157}`;

Dup

Oops. Dupe of #7.