fix: use mainline nexus

[jasonkuhrt]

• fix: dynamic output property nexus#205

Will close #304

[jasonkuhrt]

Tests will not pass until using new version of nexus. Testing locally with link approach yielded success:

❯ yarn -s jest
 PASS  tests/schema.test.ts (30.591s)
  ✓ simple schema (5793ms)
  ✓ it exposes only pagination on relations by default (5154ms)
  ✓ it exposes filtering only if filtering: true (4063ms)
  ✓ it exposes only id filters (3953ms)
  ✓ it exposes ordering only if ordering: true (3412ms)
  ✓ it exposes id ordering (3396ms)
  ✓ it exposes findOne and findMany (3141ms)

Test Suites: 1 passed, 1 total
Tests:       7 passed, 7 total
Snapshots:   7 passed, 7 total
Time:        30.684s
Ran all test suites.