chore(devDeps): make ts-jest's version exact (#458)

Author: MichaelDeBoey

package.json

@@ -67,7 +67,7 @@
     "lint-staged": "^11.1.2",
     "prettier": "2.3.2",
     "semantic-release": "^17.4.5",
-    "ts-jest": "^27.0.5",
+    "ts-jest": "27.0.5",
     "ts-node": "^10.2.1",
     "typescript": "^4.3.5"
   },