chore: Roll back to TS 4.3

Rollup is broken with TypeScript 4.4 due to

rollup/plugins#983

package.json

@@ -48,7 +48,7 @@
     "rollup": "^2.56.3",
     "standard-version": "^9.3.1",
     "tslib": "^2.3.1",
-    "typescript": "^4.4.2"
+    "typescript": "4.3.5"
   },
   "dependencies": {
     "aws-lambda": "^1.0.6",

yarn.lock

@@ -1851,10 +1851,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^4.4.2:
-  version "4.4.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.4.2.tgz#6d618640d430e3569a1dfb44f7d7e600ced3ee86"
-  integrity sha512-gzP+t5W4hdy4c+68bfcv0t400HVJMMd2+H9B7gae1nQlBzCqvrXX+6GL/b3GAgyTH966pzrZ70/fRjwAtZksSQ==
+typescript@4.3.5:
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
+  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
 
 ua-parser-js@^0.7.28:
   version "0.7.28"