Update CMakeLists.txt

Add `-parse-as-library` to the build for `@main`.

Author: compnerd

Sources/sourcekit-lsp/CMakeLists.txt

@@ -6,6 +6,8 @@ target_link_libraries(sourcekit-lsp PRIVATE
   LanguageServerProtocolJSONRPC
   SKCore
   SourceKitLSP)
+target_compile_options(sourcekit-lsp PRIVATE
+  -parse-as-library)
 target_link_libraries(sourcekit-lsp PRIVATE
   $<$<NOT:$<PLATFORM_ID:Darwin>>:FoundationXML>)