message: test(core): refactor imports
  a bit cleaner and now typed
diff: -// import { flatMatch, processSource } from '@stylable/core-test-kit';
  -import * as chai from 'chai';
  +import { expect } from 'chai';
  +import valueParser from 'postcss-value-parser';
  import { getFormatterArgs } from '../src/stylable-value-parsers';
  -const valueParser = require('postcss-value-parser');
  -
  -const expect = chai.expect;
  -
  function getFunctionNode(src: string) {
  return valueParser(src).nodes[0];
  }
  