Bump ssh2 from 1.8.0 to 1.9.0

Bumps [ssh2](https://github.com/mscdex/ssh2) from 1.8.0 to 1.9.0.
- [Release notes](https://github.com/mscdex/ssh2/releases)
- [Commits](https://github.com/mscdex/ssh2/compare/v1.8.0...v1.9.0)

---
updated-dependencies:
- dependency-name: ssh2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -72,7 +72,7 @@
     "source-code-pro": "^2.38.0",
     "source-map-loader": "^3.0.1",
     "source-sans-pro": "3.6.0",
-    "ssh2": "^1.8.0",
+    "ssh2": "^1.9.0",
     "style-loader": "^3.3.1",
     "svg-inline-loader": "^0.8.2",
     "ts-loader": "^9.2.8",