Support main branch when fetching Arduino libraries from GitHub

[evgenykochetkov]

When creating a new repository, GitHub suggests calling the default branch main instead of master, and some existing repositories are migrating. We should support both when fetching libraries using #pragma XOD require "link_to_library".

Right now, we have master hardcoded in

xod/packages/xod-deploy/src/libraryManager.js

Lines 22 to 26 in a7d88dd

	// :: URL -> URL
	const getGithubArchiveUrl = R.compose(
	R.concat(R.__, '/archive/master.zip'),
	R.when(R.pipe(R.tail, R.equals('/')), R.init)
	);