Incompatibility with Node 10 introduced in #748

[rwjblue]

Looks like #748 introduced an incompatibility with Node 10 due to Object.fromEntries usage:

embroider/packages/compat/src/v1-addon.ts

Lines 800 to 802 in 031ce6d

	files = Object.fromEntries(
	walkSync(dir, { globs: ['**/*.js', '**/*.hbs'] }).map(f => [`./${f}`, `./${localDir}/${f}`])
	);

Added in 56db384.