Fine package.json and tsconfig.json (#30)

* feat: add package.json for files and kepwords

Signed-off-by: KeisukeYamashita <19yamashita15@gmail.com>

* feat: add exports

Signed-off-by: KeisukeYamashita <19yamashita15@gmail.com>

---------

Signed-off-by: KeisukeYamashita <19yamashita15@gmail.com>

package.json

@@ -1,9 +1,13 @@
 {
   "name": "graphql-citadel",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "Easy to use schema-first GraphQL schema directive for authentication and authorization",
-  "main": "./dist/index.js",
-  "types": "./dist/index.d.ts",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "exports": {
+    ".": "./dist/index.js",
+    "./errors": "./dist/errors/index.js"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/KeraphQL/graphql-citadel.git"
@@ -14,7 +18,13 @@
     "build": "tsc"
   },
   "files": [
-    "dist"
+    "dist/"
+  ],
+  "keywords": [
+    "authentication",
+    "authorization",
+    "graphql",
+    "security"
   ],
   "dependencies": {
     "@apollo/server": "^4.6.0",