Bump matrix-js-sdk from 17.2.0 to 19.7.0

Bumps [matrix-js-sdk](https://github.com/matrix-org/matrix-js-sdk) from 17.2.0 to 19.7.0.
- [Release notes](https://github.com/matrix-org/matrix-js-sdk/releases)
- [Changelog](https://github.com/matrix-org/matrix-js-sdk/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/matrix-org/matrix-js-sdk/compare/v17.2.0...v19.7.0)

---
updated-dependencies:
- dependency-name: matrix-js-sdk
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -8,7 +8,7 @@
     "config": "^3.1.0",
     "dom-storage": "^2.1.0",
     "imap": "^0.8.19",
-    "matrix-js-sdk": "^17.2.0",
+    "matrix-js-sdk": "^19.7.0",
     "olm": "https://matrix.org/packages/npm/olm/olm-3.0.0.tgz",
     "process": "^0.11.10"
   },