workflow: added jest dep with version equal as the server's

package.json

@@ -31,12 +31,14 @@
 		"@rollup/plugin-commonjs": "^16.0.0",
 		"@rollup/plugin-node-resolve": "^10.0.0",
 		"@rollup/plugin-replace": "^2.3.4",
+		"@types/jest": "26.0.22",
 		"@typescript-eslint/eslint-plugin": "4.21.0",
 		"@typescript-eslint/parser": "4.21.0",
 		"esbuild": "^0.8.22",
 		"eslint": "7.23.0",
 		"eslint-config-prettier": "^8.1.0",
 		"eslint-plugin-prettier": "3.3.1",
+		"jest": "26.6.3",
 		"node-sass": "^6.0.0",
 		"npm-run-all": "^4.1.5",
 		"postcss": "^8.2.1",