[Snyk] Security upgrade jest from 26.4.2 to 27.0.2 (#536)

* fix: webapp/package.json & webapp/package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-CROSSSPAWN-8303230
- https://snyk.io/vuln/SNYK-JS-BRACES-6838727
- https://snyk.io/vuln/SNYK-JS-INFLIGHT-6095116
- https://snyk.io/vuln/SNYK-JS-MICROMATCH-6838728
- https://snyk.io/vuln/SNYK-JS-UNSETVALUE-2400660

* added jest test environment

---------

Co-authored-by: snyk-bot <snyk-bot@snyk.io>
Co-authored-by: kshitij katiyar <kshitij.katiyar@brightscout.com>

Author: 3 people

webapp/jest.config.json

@@ -7,5 +7,6 @@
         "^.+\\.(css|less|scss)$": "identity-obj-proxy",
         "^.*i18n.*\\.(json)$": "<rootDir>/tests/i18n_mock.json",
         "^bundle-loader\\?lazy\\!(.*)$": "$1"
-    }
+    },
+    "testEnvironment": "jsdom"
 }