* Spec compatibility for template literals.
* Update preset-es2015 `spec` expected case.
* Prevent array mutability by replacing `shift`.
* Fix condition for single item.
* Group concats to ensure toPrimitive sequence.
* Update function test case.
* Add semi for function test case.
* Simplify concat call expressions creating.
* Fix some cases with multiple idengifiers.
* Add test case with different literals.
* Add test case for `Symbol()` and toPrimitive order
* Add actual literal case.
* Add minNodeVersion to template literals order.
* Flip the logical expression.
* Update README for template literals spec option.
* docs [skip ci]
