fix(deps): update dependency js-yaml to v4

Author: renovate[bot]

package.json

@@ -13,13 +13,13 @@
     "heroku-postbuild": "npm run build"
   },
   "dependencies": {
-    "js-yaml": "3.14.2",
+    "js-yaml": "4.1.1",
     "probot": "9.15.1"
   },
   "devDependencies": {
     "@types/bunyan": "1.8.11",
     "@types/jest": "26.0.24",
-    "@types/js-yaml": "3.12.10",
+    "@types/js-yaml": "4.0.9",
     "@types/node": "10.17.60",
     "jest": "26.6.3",
     "nodemon": "2.0.22",

yarn.lock

@@ -829,10 +829,10 @@
     jest-diff "^26.0.0"
     pretty-format "^26.0.0"
 
-"@types/js-yaml@3.12.10":
-  version "3.12.10"
-  resolved "https://registry.yarnpkg.com/@types/js-yaml/-/js-yaml-3.12.10.tgz#4d80d0c7dfc570eb4f0be280cb2d67789f977ba5"
-  integrity sha512-/Mtaq/wf+HxXpvhzFYzrzCqNRcA958sW++7JOFC8nPrZcvfi/TrzOaaGbvt27ltJB2NQbHVAg5a1wUCsyMH7NA==
+"@types/js-yaml@4.0.9":
+  version "4.0.9"
+  resolved "https://registry.yarnpkg.com/@types/js-yaml/-/js-yaml-4.0.9.tgz#cd82382c4f902fed9691a2ed79ec68c5898af4c2"
+  integrity sha512-k4MGaQl5TGo/iipqb2UDG2UwjXziSWkh0uysQelTlJpX1qGlpUZYm8PnO4DxG1qBomtJUdYJ6qR6xdIah10JLg==
 
 "@types/mime@*":
   version "3.0.1"
@@ -1013,6 +1013,11 @@ argparse@^1.0.7:
   dependencies:
     sprintf-js "~1.0.2"
 
+argparse@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/argparse/-/argparse-2.0.1.tgz#246f50f3ca78a3240f6c997e8a9bd1eac49e4b38"
+  integrity sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==
+
 arr-diff@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-4.0.0.tgz#d6461074febfec71e7e15235761a329a5dc7c520"
@@ -3148,13 +3153,12 @@ js-tokens@^4.0.0:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
   integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
 
-js-yaml@3.14.2:
-  version "3.14.2"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.14.2.tgz#77485ce1dd7f33c061fd1b16ecea23b55fcb04b0"
-  integrity sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==
+js-yaml@4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.1.1.tgz#854c292467705b699476e1a2decc0c8a3458806b"
+  integrity sha512-qQKT4zQxXl8lLwBtHMWwaTcGfFOZviOJet3Oy/xmGk2gZH677CJM9EvtfdSkgWcATZhj/55JZ0rmy3myCT5lsA==
   dependencies:
-    argparse "^1.0.7"
-    esprima "^4.0.0"
+    argparse "^2.0.1"
 
 js-yaml@^3.13.1:
   version "3.14.1"