cli: add support for ts4

packages/cli/package.json

@@ -84,12 +84,12 @@
     "rollup-pluginutils": "^2.8.2",
     "start-server-webpack-plugin": "^2.2.5",
     "style-loader": "^1.2.1",
-    "sucrase": "^3.14.1",
+    "sucrase": "^3.16.0",
     "tar": "^6.0.1",
     "terser-webpack-plugin": "^1.4.3",
     "ts-jest": "^26.0.0",
     "ts-loader": "^7.0.4",
-    "typescript": "^3.9.3",
+    "typescript": "^4.0.3",
     "url-loader": "^4.1.0",
     "webpack": "^4.41.6",
     "webpack-dev-server": "^3.11.0",

packages/docgen/package.json

@@ -31,7 +31,7 @@
     "fs-extra": "^9.0.0",
     "github-slugger": "^1.3.0",
     "ts-node": "^8.6.2",
-    "typescript": "^3.9.3"
+    "typescript": "^4.0.3"
   },
   "devDependencies": {
     "@types/fs-extra": "^9.0.1",