Fixed build setup

package.json

 {
   "name": "json-schema-faker",
-  "version": "0.5.0-rc17",
+  "version": "0.5.0-rc18",
   "description": "JSON-Schema + fake data generators",
   "homepage": "http://json-schema-faker.js.org",
   "main": "dist/index.js",
@@ -8,8 +8,7 @@
   "unpkg": "dist/bundle.umd.min.js",
   "browser": "dist/index.umd.min.js",
   "scripts": {
-    "build:concat:dist": "concat -o dist/bundle.umd.min.js node_modules/json-schema-ref-parser/dist/ref-parser.min.js node_modules/jsonpath-plus/dist/index-umd.min.js dist/index.umd.min.js",
-    "build:browser": "bili --banner --format umd --format umd-min --module-name JSONSchemaFaker --minimal && npm run build:concat:dist",
+    "build:browser": "bili --banner --format umd --format umd-min --module-name JSONSchemaFaker --minimal",
     "build:node": "bili src/index.js --minimal --format es --format cjs",
     "build": "npm run build:browser && npm run build:node",
     "dev": "npm test -- -w",
@@ -46,12 +45,6 @@
     "fake",
     "mocks"
   ],
-  "bili": {
-    "external": [
-      "json-schema-ref-parser",
-      "jsonpath"
-    ]
-  },
   "files": [
     "dist/*.*"
   ],
@@ -62,7 +55,6 @@
     "chance": "^1.0.9",
     "clone": "^2.1.2",
     "codecov": "^3.0.0",
-    "concat": "^1.0.3",
     "cryptiles": "^4.1.3",
     "eslint": "^6.0.1",
     "eslint-config-airbnb-base": "^14.0.0",