Merge pull request #27 from duckduckgo/alex/upload-xcframework

prepare_release.sh script building and uploading xcframework
Task/Issue URL: https://app.asana.com/1/137249556945/project/1203301625297703/task/1210725543567479?focus=true
macOS PR: duckduckgo/apple-browsers#1269

Author: mallexxx

.gitignore

@@ -2,4 +2,7 @@
 cmake-build-debug
 build
 .swiftpm/
-.DS_Store
+.build/
+.DS_Store
+test-bloom-filter.bin
+