fix: upgrade multiple dependencies with Snyk (nodeshift#487)

Snyk has created this PR to upgrade:
  - @babel/core from 7.12.0 to 7.12.1.
    See this package in npm: https://www.npmjs.com/package/@babel/core
  - @babel/preset-env from 7.12.0 to 7.12.1.
    See this package in npm: https://www.npmjs.com/package/@babel/preset-env

See this project in Snyk:
https://app.snyk.io/org/nodeshift-agg/project/0569fa2f-39b2-4a6a-9bdc-8ac878d28a88?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -46,8 +46,8 @@
   },
   "homepage": "https://nodeshift.dev/opossum",
   "devDependencies": {
-    "@babel/core": "^7.12.0",
-    "@babel/preset-env": "^7.12.0",
+    "@babel/core": "^7.12.1",
+    "@babel/preset-env": "^7.12.1",
     "babel-loader": "^8.0.6",
     "codacy-coverage": "^3.4.0",
     "coveralls": "^3.1.0",