Remove equal sign from package.json dependencies

[toschdev]

Expected behavior

Dependencies should be listed with a specific version. Just plain the version in order to get sure it is the exact version.

E.g.

"dependencies": {
		"babel-polyfill": "6.26.0",
	}

Actual behavior

The version of the dependency contains an equal sign.

E.g.

"dependencies": {
		"babel-polyfill": "=6.26.0",
	}

More Details

In the documentation of npm an equal sign does not exist. Therefore probably redundant:
https://docs.npmjs.com/files/package.json#dependencies

[willclarktech]

This should also update .npmrc to use save-exact = true instead of save-prefix.