Add typings.

Author: jaywcjlove

.gitignore

@@ -2,7 +2,7 @@ cjs
 esm
 esnext
 umd
-typing
+typings
 dist
 node_modules
 doc

package.json

@@ -9,12 +9,12 @@
     "esm/",
     "esnext/"
   ],
-  "typings": "typing/index.d.ts",
+  "typings": "typings/index.d.ts",
   "scripts": {
     "type-check": "tsc -p ./src --noEmit",
     "type-check:watch": "npm run type-check -- --watch",
     "build": "npm run build:esm && npm run build:cjs && npm run build:umd && npm run build:types",
-    "build:types": "tsc -p ./src --emitDeclarationOnly --outDir typing",
+    "build:types": "tsc -p ./src --emitDeclarationOnly --outDir typings",
     "build:cjs": "BABEL_ENV=cjs babel ./src --out-dir cjs --extensions \".ts,.tsx\" --source-maps inline --delete-dir-on-start --verbose",
     "build:watch:esm": "BABEL_ENV=esmdev babel ./src --out-dir esm --extensions \"*.ts,.tsx\" --source-maps true --copy-files --delete-dir-on-start --verbose",
     "build:esm": "BABEL_ENV=esm babel ./src --out-dir esm --extensions \"*.ts,.tsx\" --source-maps true --delete-dir-on-start --verbose",