chore(deps): pin dependencies

package.json

@@ -39,7 +39,7 @@
     "@types/chai": "4.2.14",
     "@types/mocha": "8.0.3",
     "@types/node": "14.14.6",
-    "@types/pino": "^6.3.3",
+    "@types/pino": "6.3.3",
     "@types/sinon": "9.0.8",
     "@types/sinon-chai": "3.2.5",
     "@typescript-eslint/eslint-plugin": "4.6.1",
@@ -52,7 +52,7 @@
     "lint-staged": "10.5.1",
     "mocha": "8.2.1",
     "nyc": "15.1.0",
-    "pino": "^6.7.0",
+    "pino": "6.7.0",
     "prettier": "2.1.2",
     "proxyquire": "2.1.3",
     "reflect-metadata": "0.1.13",
@@ -75,7 +75,7 @@
     "pino": "^6.7.0"
   },
   "dependencies": {
-    "lodash.isplainobject": "^4.0.6",
-    "lodash.isstring": "^4.0.1"
+    "lodash.isplainobject": "4.0.6",
+    "lodash.isstring": "4.0.1"
   }
 }