build(deps-dev): bump typescript from 3.4.2 to 3.4.3

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.4.2 to 3.4.3.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.4.2...v3.4.3)

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

package.json

@@ -157,7 +157,7 @@
     "sinon": "^7.1.1",
     "ts-node": "^8.0.2",
     "typedoc": "^0.14.2",
-    "typescript": "3.4.2"
+    "typescript": "3.4.3"
   },
   "optionalDependencies": {
     "@malept/electron-installer-flatpak": "^0.9.0",

yarn.lock

@@ -8338,10 +8338,10 @@ typescript@3.2.x:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.2.4.tgz#c585cb952912263d915b462726ce244ba510ef3d"
   integrity sha512-0RNDbSdEokBeEAkgNbxJ+BLwSManFy9TeXz8uW+48j/xhEXv1ePME60olyzw2XzUqUBNAYFeJadIqAgNqIACwg==
 
-typescript@3.4.2:
-  version "3.4.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.4.2.tgz#9ed4e6475d906f589200193be056f5913caed481"
-  integrity sha512-Og2Vn6Mk7JAuWA1hQdDQN/Ekm/SchX80VzLhjKN9ETYrIepBFAd8PkOdOTK2nKt0FCkmMZKBJvQ1dV1gIxPu/A==
+typescript@3.4.3:
+  version "3.4.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.4.3.tgz#0eb320e4ace9b10eadf5bc6103286b0f8b7c224f"
+  integrity sha512-FFgHdPt4T/duxx6Ndf7hwgMZZjZpB+U0nMNGVCYPq0rEzWKjEDobm4J6yb3CS7naZ0yURFqdw9Gwc7UOh/P9oQ==
 
 uglify-js@3.4.x, uglify-js@^3.1.4:
   version "3.4.10"