use ethers.js 5.1.4 (#1142)

to reproduce the issue:
```
contract C {
  error E();
  function f() public { revert E(); }
}
```

Author: yann300

apps/remix-ide-e2e/src/tests/recorder.spec.ts

@@ -83,7 +83,7 @@ module.exports = {
       .testFunction('last',
         {
           status: 'true Transaction mined and execution succeed',
-          'decoded input': { 'uint256 _po': { type: 'BigNumber', hex: '0x0a' } }
+          'decoded input': { 'uint256 _po': '10' }
         })
       .end()
   }