Change package.json license to new format (YousefED#479)

Author: 4LT

package.json

@@ -32,11 +32,7 @@
     "type": "git",
     "url": "[email protected]:YousefED/typescript-json-schema.git"
   },
-  "licenses": [
-    {
-      "type": "BSD-3-Clause"
-    }
-  ],
+  "license": "BSD-3-Clause",
   "keywords": [
     "typescript",
     "json",
@@ -78,4 +74,4 @@
     "dev": "tsc -w",
     "test:dev": "mocha -t 5000 --watch --require source-map-support/register dist/test"
   }
-}
+}