fix: upgrade @types/js-yaml from 3.12.6 to 3.12.7 (#503)

Snyk has created this PR to upgrade @types/js-yaml from 3.12.6 to 3.12.7.

See this package in npm:
https://www.npmjs.com/package/@types/js-yaml

See this project in Snyk:
https://app.snyk.io/org/kpt-fn-bot/project/206705c7-640c-491f-9f5b-bcb93537444e?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

functions/contrib/ts/sops/package-lock.json

@@ -29,7 +29,7 @@
   },
   "devDependencies": {
     "@types/jasmine": "^3.7.7",
-    "@types/js-yaml": "^3.12.5",
+    "@types/js-yaml": "^3.12.7",
     "@types/node": "^14.17.3",
     "@types/rw": "file:@types/rw",
     "create-kpt-functions": "^0.18.0",