Set fixed version of typescript, ref: facebook/create-react-app#10110.

Author: jessgusclark

package.json

@@ -25,7 +25,7 @@
     "react-dom": "^17.0.1",
     "react-scripts": "4.0.0",
     "rskjs-util": "^1.0.3",
-    "typescript": "^4.0.3"
+    "typescript": "~4.0.5"
   },
   "devDependencies": {
     "@rsksmart/ipfs-cpinner-client": "^0.1.1-beta.2",

yarn.lock

@@ -13356,10 +13356,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^4.0.3:
-  version "4.1.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.2.tgz#6369ef22516fe5e10304aae5a5c4862db55380e9"
-  integrity sha512-thGloWsGH3SOxv1SoY7QojKi0tc+8FnOmiarEGMbd/lar7QOEd3hvlx3Fp5y6FlDUGl9L+pd4n2e+oToGMmhRQ==
+typescript@~4.0.5:
+  version "4.0.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.5.tgz#ae9dddfd1069f1cb5beb3ef3b2170dd7c1332389"
+  integrity sha512-ywmr/VrTVCmNTJ6iV2LwIrfG1P+lv6luD8sUJs+2eI9NLGigaN+nUQc13iHqisq7bra9lnmUSYqbJvegraBOPQ==
 
 uint8arrays@^1.1.0:
   version "1.1.0"