clean up tsconfig and drop redundant imports

tsconfig.json

@@ -1,20 +1,14 @@
 {
   "compilerOptions": {
     "target": "ESNext",
-    "useDefineForClassFields": true,
     "lib": ["DOM", "DOM.Iterable", "ESNext"],
-    "allowJs": false,
-    "skipLibCheck": false,
-    "allowSyntheticDefaultImports": true,
-    "strict": true,
-    "forceConsistentCasingInFileNames": true,
     "module": "ESNext",
     "moduleResolution": "Bundler",
-    "resolveJsonModule": true,
+    "strict": true,
     "isolatedModules": true,
     "noEmit": true,
-    "jsx": "react",
+    "jsx": "react-jsx",
     "plugins": [{ "name": "typescript-plugin-css-modules" }]
   },
-  "include": ["./src"]
+  "include": ["src"]
 }