Upgrade matrix-js-sdk to 6.2.0-rc.1

package.json

@@ -48,7 +48,7 @@
     "find-npm-prefix": "^1.0.2",
     "fs-extra": "^8.1.0",
     "glob": "^7.1.6",
-    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
+    "matrix-js-sdk": "6.2.0-rc.1",
     "mkdirp": "^1.0.3",
     "needle": "^2.3.2",
     "node-pre-gyp": "^0.14.0",

yarn.lock

@@ -2862,9 +2862,10 @@ map-age-cleaner@^0.1.1:
   dependencies:
     p-defer "^1.0.0"
 
-"matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
-  version "6.1.0"
-  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/a4a7097c103da42075f2c70e070fd01fa6fb0d48"
+[email protected]:
+  version "6.2.0-rc.1"
+  resolved "https://registry.yarnpkg.com/matrix-js-sdk/-/matrix-js-sdk-6.2.0-rc.1.tgz#467cc1dc9f59a95573da8bc5f9eeef76e5fdd792"
+  integrity sha512-bAg8muF2xP6kXLpbDSSWRTvkxV7QoF8H14RmMxAu4IWuQg/WB7BFcG7JZyGwyOD7gmPVPMIw8mHXGkUuh1mKtA==
   dependencies:
     "@babel/runtime" "^7.8.3"
     another-json "^0.2.0"