update to tracing-tree 0.1.10, which does not pull in syn.

Author: davidbarsky

Cargo.lock

@@ -39,5 +39,5 @@ tracing-subscriber = { version = "0.2", default-features = false, features = [
     "env-filter",
     "registry",
 ] }
-tracing-tree = { version = "0.1.4" }
+tracing-tree = { version = "0.1.10" }
 once_cell = { version = "1.5.0", features = ["unstable"] }

crates/hir_ty/Cargo.toml

@@ -36,7 +36,7 @@ lsp-server = "0.5.1"
 tracing = "0.1"
 tracing-subscriber = { version = "0.2", default-features = false, features = ["env-filter", "registry", "fmt", "tracing-log"] }
 tracing-log = "0.1.2"
-tracing-tree = { version = "0.1.4" }
+tracing-tree = { version = "0.1.10" }
 always-assert = "0.1"
 
 stdx = { path = "../stdx", version = "0.0.0" }