jest version change and prettify code

.github/workflows/integration-tests.yml

@@ -46,4 +46,4 @@ jobs:
               version: 'v1.15.1'
 
          - name: Validate kubectl setup
-           run: python test/validate-kubectl.py 'v1.15.1'
+           run: python test/validate-kubectl.py 'v1.15.1'

action.yml

@@ -12,4 +12,4 @@ branding:
    color: 'blue'
 runs:
    using: 'node16'
-   main: 'lib/index.js'
+   main: 'lib/index.js'

package.json

@@ -23,12 +23,12 @@
       "@actions/tool-cache": "^1.0.0"
    },
    "devDependencies": {
-      "@types/jest": "^25.2.2",
+      "@types/jest": "^26.0.0",
       "@types/node": "^12.0.4",
       "@vercel/ncc": "^0.33.1",
       "jest": "^26.0.1",
       "prettier": "2.7.1",
-      "ts-jest": "^25.5.1",
+      "ts-jest": "^26.0.0",
       "typescript": "3.9.2"
    }
-}
+}