Merge pull request #1240 from rust-lang/dependabot/cargo/syn-1.0.63

Cargo.lock

@@ -1708,9 +1708,9 @@ checksum = "1e81da0851ada1f3e9d4312c704aa4f8806f0f9d69faaf8df2f3464b4a9437c2"
 
 [[package]]
 name = "syn"
-version = "1.0.62"
+version = "1.0.63"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "123a78a3596b24fee53a6464ce52d8ecbf62241e6294c7e7fe12086cd161f512"
+checksum = "8fd9bc7ccc2688b3344c2f48b9b546648b25ce0b20fc717ee7fa7981a8ca9717"
 dependencies = [
  "proc-macro2",
  "quote",