deps: Upgrade jest-expo to 42.1.0, the latest.

This gets us expo/expo#12735, which lets us use Jest 26, instead of
25, without the `resolutions` hack we added in f1b59fe. So, remove
that hack.

Author: chrisbobbe

package.json

@@ -115,7 +115,7 @@
     "jest-cli": "^26.4.1",
     "jest-environment-jsdom": "^26.3.0",
     "jest-environment-jsdom-global": "^2.0.4",
-    "jest-expo": "^40.0.1",
+    "jest-expo": "^42.1.0",
     "jest-extended": "^0.11.5",
     "jetifier": "^1.6.5",
     "lolex": "^5.1.1",
@@ -130,8 +130,5 @@
     "rollup": "^2.26.5",
     "typescript": "~3.8.3",
     "yarn-deduplicate": "^3.0.0"
-  },
-  "resolutions": {
-    "jest-expo/jest": "^26.4.1"
   }
 }