build(deps-dev): bump tsd from 0.18.0 to 0.19.1

Bumps [tsd](https://github.com/SamVerschueren/tsd) from 0.18.0 to 0.19.1.
- [Release notes](https://github.com/SamVerschueren/tsd/releases)
- [Commits](tsdjs/tsd@v0.18.0...v0.19.1)

---
updated-dependencies:
- dependency-name: tsd
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -166,7 +166,7 @@
     "tap": "^15.0.5",
     "tap-mocha-reporter": "^5.0.1",
     "then-sleep": "^1.0.1",
-    "tsd": "^0.18.0",
+    "tsd": "^0.19.1",
     "typescript": "^4.0.2",
     "undici": "^3.3.5",
     "x-xss-protection": "^2.0.0",