⬆️ Upgrade jest monorepo to v26

package.json

@@ -34,7 +34,7 @@
     "@types/jest": "25.2.1",
     "@types/node": "10.17.21",
     "@types/prompts": "2.0.6",
-    "babel-jest": "25.5.1",
+    "babel-jest": "26.0.0",
     "codecov": "3.6.5",
     "eslint": "6.8.0",
     "eslint-config-oclif": "3.1.0",
@@ -43,7 +43,7 @@
     "eslint-plugin-prettier": "3.1.3",
     "globby": "11.0.0",
     "husky": "4.2.5",
-    "jest": "25.5.4",
+    "jest": "26.0.0",
     "prettier": "2.0.5",
     "pretty-quick": "2.0.1",
     "semantic-release": "17.0.7",