Add typescript as a dependency (#434)

Author: pvdlg

package.json

@@ -89,6 +89,7 @@
 		"semver": "^7.1.3",
 		"slash": "^3.0.0",
 		"to-absolute-glob": "^2.0.2",
+		"typescript": "^3.0.0",
 		"update-notifier": "^4.0.0"
 	},
 	"devDependencies": {
@@ -101,8 +102,7 @@
 		"nyc": "^15.0.0",
 		"pify": "^4.0.0",
 		"proxyquire": "^2.1.3",
-		"temp-write": "^4.0.0",
-		"typescript": "^3.7.5"
+		"temp-write": "^4.0.0"
 	},
 	"eslintConfig": {
 		"extends": "eslint-config-xo"