Cannot process certain response strings

https://github.com/substack/http-browserify/blob/master/lib/response.js#L107

Due to the way this regex is used, a response String that contains the substring "ArrayBuffer" is assumed to be an ArrayBuffer. For example, `http-browserify` cannot load a page containing its own source because the regex will select itself.

Start at lib/response.js line 107 and inspect how the regex classifies response strings. Reproduce the issue with a response containing the substring "ArrayBuffer", including the project's own source; done means such text is processed as a normal response rather than misidentified as an ArrayBuffer.

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