Import syn-mid-0.5.0

Change-Id: I935c8508d0431ec5ee2b29321c2b986785eeda38
diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
new file mode 100644
index 0000000..69b0ee6
--- /dev/null
+++ b/.cargo_vcs_info.json
@@ -0,0 +1,5 @@
+{
+  "git": {
+    "sha1": "4cc7697b87772a2eab48efd9dec4e293276dbc20"
+  }
+}