chore(deps): pin dependencies

package.json

@@ -69,28 +69,28 @@
     "@commitlint/cli": "8.1.0",
     "@commitlint/config-conventional": "8.1.0",
     "@commitlint/travis-cli": "8.1.0",
-    "@lykmapipo/express-test-helpers": "^0.8.6",
+    "@lykmapipo/express-test-helpers": "0.8.6",
     "@lykmapipo/mongoose-test-helpers": "0.7.18",
     "chai": "4.2.0",
     "commitizen": "4.0.3",
-    "coveralls": "^3.0.6",
+    "coveralls": "3.0.6",
     "cz-conventional-changelog": "3.0.2",
     "doxdox": "3.0.0",
     "eslint": "6.3.0",
     "eslint-config-airbnb-base": "14.0.0",
     "eslint-config-prettier": "6.1.0",
     "eslint-plugin-import": "2.18.2",
-    "eslint-plugin-jsdoc": "^15.8.3",
+    "eslint-plugin-jsdoc": "15.8.3",
     "eslint-plugin-mocha": "6.1.0",
     "eslint-plugin-prettier": "3.1.0",
     "generate-changelog": "1.8.0",
     "handlebars": "4.1.2",
     "husky": "3.0.5",
     "lint-staged": "9.2.5",
-    "lodash.template": "^4.5.0",
+    "lodash.template": "4.5.0",
     "mocha": "6.2.0",
     "mongoose": "5.6.11",
-    "nyc": "^14.1.1",
+    "nyc": "14.1.1",
     "prettier": "1.18.2",
     "rimraf": "3.0.0",
     "rollup": "1.20.3"