Update dependency typescript to v4

Author: renovate-bot

package.json

@@ -79,7 +79,7 @@
     "tail": "^2.0.3",
     "tar": "^6.0.1",
     "type-is": "^1.6.18",
-    "typescript": "^3.8.3",
+    "typescript": "^4.1.2",
     "uuid": "^7.0.2",
     "vscode-languageserver-protocol": "^3.15.3",
     "vscode-ws-jsonrpc": "^0.2.0",

yarn.lock

@@ -7131,10 +7131,10 @@ typedarray@^0.0.6:
   resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.8.3:
-  version "3.8.3"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
+typescript@^4.1.2:
+  version "4.1.2"
+  resolved "https://registry.npmjs.org/typescript/-/typescript-4.1.2.tgz#6369ef22516fe5e10304aae5a5c4862db55380e9"
+  integrity sha512-thGloWsGH3SOxv1SoY7QojKi0tc+8FnOmiarEGMbd/lar7QOEd3hvlx3Fp5y6FlDUGl9L+pd4n2e+oToGMmhRQ==
 
 uncss@^0.17.2:
   version "0.17.3"