v4+ places imports inside parser function, but types using those imports outside

[ConradHughes]

When I upgrade from 3.1.0 to any 4.x version, the imports I have in {{ global initialization }} are placed inside the const peggyParser definition. This breaks compilation because type definitions at the end of the generated source file — which need these imports — can't then find imported types. I see no mention of this breaking change in the v4 release notes. Any suggestions please?

As a side note, if I have v4 peggy and v4 ts-pegjs I also get complaints about Cannot find module ts-pegjs/node_modules/prettier/standalone imported from tspegjs.mjs. I assume this is an ESM issue; any workaround for folk stuck (for the time being) on CJS?