add eslint explicitly as a dev dependency

package.json

@@ -31,7 +31,8 @@
   },
   "devDependencies": {
     "husky": "^4.2.5",
-    "prettier": "2.0.2"
+    "prettier": "2.0.2",
+    "eslint": "^5.16.0"
   },
   "husky": {
     "hooks": {

yarn.lock

@@ -4197,7 +4197,7 @@
     "@typescript-eslint/typescript-estree" "2.9.0"
     eslint-visitor-keys "^1.1.0"
 
-"@typescript-eslint/parser@^2.6.1":
+"@typescript-eslint/parser@^2.34.0", "@typescript-eslint/parser@^2.6.1":
   version "2.34.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-2.34.0.tgz#50252630ca319685420e9a39ca05fe185a256bc8"
   integrity sha512-03ilO0ucSD0EPTw2X4PntSIRFtDPWjrVq7C3/Z3VQHRC7+13YB55rcJI3Jt+YgeHbjUdJPcPa7b23rXCBokuyA==