bump witx to 0.8.4 (#245)

Pat Hickey · web-flow · commit 068b282abfe3 · 2020-03-17T13:23:59.000-07:00
diff --git a/tools/witx/Cargo.toml b/tools/witx/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "witx"
-version = "0.8.3"
+version = "0.8.4"
 description = "Parse and validate witx file format"
 homepage = "https://github.com/WebAssembly/WASI"
 repository = "https://github.com/WebAssembly/WASI"
