Use minify prelude only minify option

[terrierscript]

I found JSConcatPackager use minify file when option.minify = false

[DeMoorJasper]

In theory prelude should never be debugged by the end user as it should be working perfectly. Therefore it wouldn't matter as it's pre-minified and doesn't really affect speed.

Although if it ever does cause a bug it might be hard to debug so I guess it's a good idea after all.

[terrierscript]

I agree.

This mimicked from JSPackager.

parcel/src/packagers/JSPackager.js

Lines 8 to 16 in c184390

	const prelude = {
	source: fs
	.readFileSync(path.join(__dirname, '../builtins/prelude.js'), 'utf8')
	.trim(),
	minified: fs
	.readFileSync(path.join(__dirname, '../builtins/prelude.min.js'), 'utf8')
	.trim()
	.replace(/;$/, '')
	};