When using the result of require as a value along with strings, tstl gives weird errors

Example:

const foo = require("a").foo + require("b").foo
// or
require("someFunctionExport")("foo")

tstl reports Could not resolve lua source files for require path 'a") + require("b' in file src/control.ts.

This looks like like tstl is using a regexp search on the output lua to do module/file resolution, that seems very fragile. This probably is also related to #1101.