fix: Resolve TypeScript errors

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

client/node_modules/level-concat-iterator/CHANGELOG.md

@@ -0,0 +1,45 @@
+# Changelog
+
+## [Unreleased][unreleased]
+
+## [2.0.1] - 2019-04-01
+
+### Changed
+
+- Upgrade `standard` devDependency from `^11.0.1` to `^12.0.1` ([`6b957cf`](https://github.com/Level/concat-iterator/commit/6b957cf)) ([**@vweevers**](https://github.com/vweevers))
+- Apply common project tweaks ([#12](https://github.com/Level/concat-iterator/issues/12), [#13](https://github.com/Level/concat-iterator/issues/13), [`0c1d4e0`](https://github.com/Level/concat-iterator/commit/0c1d4e0)) ([**@vweevers**](https://github.com/vweevers))
+
+### Added
+
+- Add `nyc` and `coveralls` ([#11](https://github.com/Level/concat-iterator/issues/11), [`a3e312a`](https://github.com/Level/concat-iterator/commit/a3e312a)) ([**@ralphtheninja**](https://github.com/ralphtheninja), [**@vweevers**](https://github.com/vweevers))
+
+### Removed
+
+- Remove node 9 from travis ([`0347b82`](https://github.com/Level/concat-iterator/commit/0347b82)) ([**@ralphtheninja**](https://github.com/ralphtheninja))
+
+## [2.0.0] - 2018-06-27
+
+### Changed
+
+- Detect end by checking key and value ([**@vweevers**](https://github.com/vweevers))
+- Use `level` in example instead of `leveldown` ([**@ralphtheninja**](https://github.com/ralphtheninja))
+- End iterator if next errors ([**@ralphtheninja**](https://github.com/ralphtheninja))
+
+### Removed
+
+- Remove custom `nextTick` parameter ([**@ralphtheninja**](https://github.com/ralphtheninja))
+
+### Added
+
+- Add `homepage` and `repository` to `package.json` ([**@ralphtheninja**](https://github.com/ralphtheninja))
+- Add `UPGRADING.md` ([**@ralphtheninja**](https://github.com/ralphtheninja))
+
+## 1.0.0 - 2018-06-24
+
+:seedling: Initial release.
+
+[unreleased]: https://github.com/Level/concat-iterator/compare/v2.0.1...HEAD
+
+[2.0.1]: https://github.com/Level/concat-iterator/compare/v2.0.0...v2.0.1
+
+[2.0.0]: https://github.com/Level/concat-iterator/compare/v1.0.0...v2.0.0