Can’t get tests happy with generator functions

[RoyalIcing]

Running tests via npm t hits a regeneratorRuntime is not defined error. Not sure if we need to change how node_modules are processed or somehow tell Babel to just keep the generator functions as-is.

 FAIL  src/index.test.ts
  ● Test suite failed to run

    ReferenceError: regeneratorRuntime is not defined

    > 1 | import { has, optional, parse as parseWith, ParseGenerator, ParseYieldable } from 'parcook';
        | ^
      2 | 
      3 | const whitespaceOptional = /^\s*/;
      4 | 

      at Object.<anonymous> (node_modules/parcook/src/index.ts:141:18)
      at Object.<anonymous> (src/index.ts:1:1)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        0.705 s
Ran all test suites.