Fix build output to fix package publishing

Author: pimterry

custom-typings/package.json.d.ts

@@ -0,0 +1 @@
+declare module '*.json';

tsconfig.json

@@ -3,18 +3,18 @@
         "declaration": true,
         "importHelpers": true,
         "module": "commonjs",
+        "rootDir": "src",
         "outDir": "lib",
         "strict": true,
         "target": "es2017",
         "composite": true,
-        "resolveJsonModule": true,
         "typeRoots" : [
             "./node_modules/@types",
             "./custom-typings"
         ]
     },
     "include": [
         "src/**/*",
-        "custom-typings/**/*.d.ts",
+        "custom-typings/**/*.d.ts"
     ]
 }