Merge pull request #94 from coderedart/build_flags_fix

fixes #93 . use target, instead of build section for web unstable apis

.cargo/config.toml

@@ -1,5 +1,6 @@
 # clipboard api is still unstable, so web-sys requires the below flag to be passed for copy (ctrl + c) to work
 # https://rustwasm.github.io/docs/wasm-bindgen/web-sys/unstable-apis.html
 # check status at https://developer.mozilla.org/en-US/docs/Web/API/Clipboard#browser_compatibility
-[build]
+# we don't use `[build]` because of rust analyzer's build cache invalidation https://github.com/emilk/eframe_template/issues/93
+[target.wasm32-unknown-unknown]
 rustflags = ["--cfg=web_sys_unstable_apis"]