fix: Resolve TypeScript errors

Signed-off-by: Hermes Agent <hermes@nosuchhost>

client/node_modules/level-supports/CHANGELOG.md

@@ -0,0 +1,17 @@
+# Changelog
+
+## [1.0.1] - 2019-10-13
+
+### Added
+
+- Document format of `additionalMethods` ([`192bc9e`](https://github.com/Level/supports/commit/192bc9e)) ([**@vweevers**](https://github.com/vweevers))
+
+### Fixed
+
+- Clone `additionalMethods` to prevent mutation ([#4](https://github.com/Level/supports/issues/4)) ([**@vweevers**](https://github.com/vweevers))
+
+## 1.0.0 - 2019-09-22
+
+:seedling: Initial release.
+
+[1.0.1]: https://github.com/Level/supports/compare/v1.0.0...v1.0.1