fix(types): explicit declare of typings (#238)

* fix(jsx): explicit declare of typings

* fix(jsx): use JSX types instead of React's

Author: muningis

client/jsx.d.ts

@@ -0,0 +1 @@
+export * from '../dist/client/jsx' 

client/package.json

@@ -3,7 +3,13 @@
   "main": "./index.js",
   "types": "./index.d.ts",
   "exports": {
-    "react": "./react.js",
-    "jsx": "./jsx.js"
+    "react": {
+      "types": "./react.d.ts",
+      "default": "./react.js"
+    },
+    "jsx": {
+      "types": "./jsx.d.ts",
+      "default": "./jsx.js"
+    }
   }
 }

client/react.d.ts

@@ -0,0 +1 @@
+export * from '../dist/client/react' 

src/types.d.ts

@@ -247,7 +247,7 @@ type MDXExport<
   ExportObject extends {},
   Frontmatter = {[key: string]: unknown},
 > = {
-  default: React.FunctionComponent<MDXContentProps>
+  default: (props: MDXContentProps) => JSX.Element,
   frontmatter: Frontmatter
 } & ExportObject