### 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

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### Browser

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### 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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lib/adapters/http.js
responseData = utils.stripBOM(responseData);
              }
            }
            response.data = responseData;
          } catch (err) {
            reject(AxiosError.from(err, null, config, response.request, response));
          }
          settle(resolve, reject, response);
        });
      }
      emitter.once('abort', err => {
        if (!responseStream.destroyed) {
          responseStream.emit('error', err);
          responseStream.destroy();
        }
      });
    });
    emitter.once('abort', err => {
      reject(err);
      req.destroy(err);
    });
    
    req.on('error', function handleRequestError(err) {
      
      
      reject(AxiosError.from(err, null, config, req));
    });
    
    req.on('socket', function handleRequestSocket(socket) {