chore(deps): pin dependencies (#651)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package.json

@@ -56,20 +56,20 @@
     "@istanbuljs/nyc-config-babel": "2.1.1",
     "axios": "0.19.0",
     "babel-plugin-istanbul": "5.2.0",
-    "chai": "^4.1.2",
+    "chai": "4.1.2",
     "codecov.io": "0.1.6",
     "cz-conventional-changelog-default-export": "0.0.0-semantically-released.1",
-    "ghooks": "^2.0.4",
-    "in-publish": "^2.0.0",
+    "ghooks": "2.0.4",
+    "in-publish": "2.0.0",
     "mocha": "6.2.0",
-    "mocha-junit-reporter": "^1.18.0",
-    "mocha-multi-reporters": "^1.1.7",
+    "mocha-junit-reporter": "1.18.0",
+    "mocha-multi-reporters": "1.1.7",
     "nodemon": "1.19.1",
     "nyc": "15.1.0",
-    "proxyquire": "^2.1.0",
+    "proxyquire": "2.1.0",
     "semantic-release": "15.13.18",
     "semver": "6.3.0",
-    "sinon": "^6.3.4",
+    "sinon": "6.3.4",
     "uuid": "3.3.2"
   },
   "dependencies": {