### Describe the bug

When upgrading from `1.2.0-alpha.1` to just `1.2.0` the config `transformResponse` sends data as binary instead of string.

### To Reproduce

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### Code snippet

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### Expected behavior

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### Axios Version

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### Adapter Version

_No response_

### Browser

_No response_

### Browser Version

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### Node.js Version

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### OS

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### Additional Library Versions

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### Additional context/Screenshots

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test/unit/adapters/http.js
res.end();
      }, 1000);
    }).listen(4444, function () {
      axios.get('ftp:google.com')
        .then(function (res) {
          success = true;
        }).catch(function (err) {
          error = err;
          failure = true;
        })
      setTimeout(function () {
        assert.equal(success, false, 'request should not succeed');
        assert.equal(failure, true, 'request should fail');
        assert.equal(error.message, 'Unsupported protocol ftp:');
        done();
      }, 300);
    })
  });
  it('should supply a user-agent if one is not specified', function (done) {
    server = http.createServer(function (req, res) {
      assert.equal(req.headers["user-agent"], 'axios/' + axios.VERSION);
      res.end();
    }).listen(4444, function () {
      axios.get('http://localhost:4444/'
      ).then(function (res) {
        done();
      }).catch(done);
    });
  });
  it('should omit a user-agent if one is explicitly disclaimed', function (done) {