Merge pull request #643 from matrix-org/t3chguy/content-type-bugfix

fix typo where `headers` was not being used and thus sent wrong content-type

src/http-api.js

@@ -730,7 +730,7 @@ module.exports.MatrixHttpApi.prototype = {
                     body: data,
                     json: false,
                     timeout: localTimeoutMs,
-                    headers: opts.headers || {},
+                    headers: headers || {},
                     _matrix_opts: this.opts,
                 },
                 function(err, response, body) {