message: update js-sdk reference in lockfile
diff: @@ -6477,7 +6477,7 @@ mathml-tag-names@^2.0.1:
  "matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
  version "8.1.0"
  - resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/64cdd73b93a475d10284977b69ef73138315b3be"
  + resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/2401ad71590d3ae3a09bbfefc758222fb6cdfd71"
  dependencies:
  "@babel/runtime" "^7.8.3"
  another-json "^0.2.0"
  