🔧 allow to specify cocoadpods acknowledgment through ENV

 > in multi projects folder of iOS projects, it looks like the cocoapods plugin is unable
to find the proper Pods-...-acknowledgments.plist file. As it takes only the 1st item of the dir,
We should be able to also specify the one we want trought an environment variable ACKNOWLEDGEMENT_PATH
just like what it is done in the SPM plugin where we do need to specify the environment variables for
DerivedDatas & Package.resolved files.

lib/license_finder/package_managers/cocoa_pods.rb

@@ -42,13 +42,17 @@ def license_texts
     end
 
     def acknowledgements_path
-      search_paths = ['Pods/Pods-acknowledgements.plist',
-                      'Pods/Target Support Files/Pods/Pods-acknowledgements.plist',
-                      'Pods/Target Support Files/Pods-*/Pods-*-acknowledgements.plist']
 
-      result = Dir[*search_paths.map { |path| File.join(project_path, path) }].first
-      raise "Found a Podfile but no Pods directory in #{project_path}. Try running pod install before running license_finder." if result.nil?
+      if !ENV['ACKNOWLEDGEMENTS_PATH'].nil?
+        result = Dir[*ENV['ACKNOWLEDGEMENTS_PATH']].first
+      else  
+        search_paths = ['Pods/Pods-acknowledgements.plist',
+                        'Pods/Target Support Files/Pods/Pods-acknowledgements.plist',
+                        'Pods/Target Support Files/Pods-*/Pods-*-acknowledgements.plist']
 
+        result = Dir[*search_paths.map { |path| File.join(project_path, path) }].first
+        raise "Found a Podfile but no Pods directory in #{project_path}. Try running pod install before running license_finder." if result.nil?
+      end
       result
     end