Update tslib requirement from ^2.0.3 to ^2.6.1

Updates the requirements on [tslib](https://github.com/Microsoft/tslib) to permit the latest version.
- [Release notes](https://github.com/Microsoft/tslib/releases)
- [Commits](microsoft/tslib@2.0.3...v2.6.1)

---
updated-dependencies:
- dependency-name: tslib
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -43,7 +43,7 @@
     "jest": "^26.6.3",
     "standard-version": "^9.1.0",
     "ts-jest": "^26.4.4",
-    "tslib": "^2.0.3",
+    "tslib": "^2.6.1",
     "typescript": "^4.4.3"
   },
   "bin": {}