Make it possible for loose parser plugins to override the base parser it uses
Make it possible for loose parser plugins to override the base parser it uses

ternjs/acorn,TimothyGu/acorn,marijnh/acorn,mysticatea/acorn,TimothyGu/acorn,marijnh/acorn,mysticatea/acorn,ternjs/acorn,marijnh/acorn,TimothyGu/acorn,mysticatea/acorn,ternjs/acorn