Don't allow instance properties transformation on namespace

[rhyzx]

Q	A
Fixed Issues?	N/A
Patch: Bug Fix?	Yes
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass?	Yes
Documentation PR Link
Any Dependency Changes?
License	MIT

Properties transformation on namespace is unnecessary and will break webpack's Tree-Shaking.

Input:

import * as op from 'rxjs/operators';
op.map(fn);

Before output:

import _mapInstanceProperty from "@babel/runtime-corejs3/core-js-stable/instance/map";
import * as op from 'rxjs/operators';

_mapInstanceProperty(op).call(op, fn);

After output:

import * as op from 'rxjs/operators';
op.map(fn);

[babel-bot]

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/11433/

[zloirock]

Seems something like that also required for the usage plugin of preset-env.

[rhyzx]

@zloirock updated for usage