fixing podspec

fixes #275

Author: Ron Radtke

package.json

@@ -1,6 +1,6 @@
 {
     "name": "react-native-blob-util",
-    "version": "0.18.4",
+    "version": "0.18.5",
     "description": "A module provides upload, download, and files access API. Supports file stream read/write for process large files.",
     "main": "index",
     "scripts": {

react-native-blob-util.podspec

@@ -1,5 +1,6 @@
 require "json"
 
+fabric_enabled = ENV['RCT_NEW_ARCH_ENABLED'] == '1'
 package = JSON.parse(File.read(File.join(__dir__, "package.json")))
 
 Pod::Spec.new do |s|
@@ -15,6 +16,8 @@ Pod::Spec.new do |s|
   s.platforms       = { :ios => "11.0" }
   s.framework    = 'AssetsLibrary'
 
-  install_modules_dependencies(s)
+  if fabric_enabled
+    install_modules_dependencies(s)
+  end
 
 end