More cleaning for errors in Deno tests

[dandv]

import cleanStack from 'npm:clean-stack';

Deno.test('clean-stack', () => {
  const e = new Error('message');
  console.log(cleanStack(e.stack, { pretty: true }));
})

$ deno test --allow-sys=homedir clean-stack.ts
Check file:///home/dandv/bugs/clean-stack.ts
running 1 test from ./clean-stack.ts
clean-stack ...
------- output -------
Error: message
    at file://~/bugs/clean-stack.ts:4:13
    at innerWrapped (ext:cli/40_test.js:191:11)
    at exitSanitizer (ext:cli/40_test.js:107:33)
    at outerWrapped (ext:cli/40_test.js:134:20)
----- output end -----
clean-stack ... ok (2ms)

ok | 1 passed | 0 failed (5ms)