clean up package "scripts" & remove ncp dependency

Author: romancow

package.json

@@ -23,14 +23,11 @@
 		"index.d.ts"
 	],
 	"scripts": {
-		"clean": "rimraf ./build ./types",
-		"copy:defs": "ncp ./src ./types --filter='src(/.*\\.d\\.ts)?$'",
-		"build:ts": "tsc -p .",
-		"prepare": "npm run build:ts && npm run copy:defs",
-		"build": "npm run clean && npm run prepare"
+		"clean": "rimraf ./index.js ./index.d.ts",
+		"build": "tsc -p .",
+		"prepare": "npm run build"
 	},
 	"devDependencies": {
-		"ncp": "^2.0.0",
 		"rimraf": "^2.6.3",
 		"typescript": "^3.5.3",
 		"vue": "^2.6.10"

yarn.lock

@@ -60,11 +60,6 @@ minimatch@^3.0.4:
   dependencies:
     brace-expansion "^1.1.7"
 
-ncp@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/ncp/-/ncp-2.0.0.tgz#195a21d6c46e361d2fb1281ba38b91e9df7bdbb3"
-  integrity sha1-GVoh1sRuNh0vsSgbo4uR6d9727M=
-
 once@^1.3.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"