Minified JavaScript gets prettified when serializing AST

[Munter]

When you load a minified javascript, parse it to AST and serialize that AST back to text, the text output will have human-readable output with newlines, indentation, etc.

In order to retain the minification of the JavaScript output, one needs to explicitly call jsAsset.minify().

Expected behavior:

Assegraph should keep minified assets minified, despite them going through AST parsing, modification and serializations.

Relates to Munter/netlify-plugin-hashfiles#134