prepare for capnp-v0.19.4 release

Author: dwrensha

capnp/CHANGELOG.md

@@ -1,3 +1,10 @@
+## v0.19.4
+- Fix possible undefined behavior in primitive_list::as_slice() on empty lists.
+- Disable primitive_list::as_slice() when T is larger than one byte and the
+  `unaligned` feature is enabled.
+- Enable primitive_list::as_slice() for big-endian targets when T is at most
+  one byte.
+
 ## v0.19.3
 - Rename ReadSegmentTableResult to NoAllocSegmentTableInfo and make it public.
 - Rename NoAllocBufferSegments::from_segment_table() to

capnp/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "capnp"
-version = "0.19.3"
+version = "0.19.4"
 authors = [ "David Renshaw <dwrenshaw@gmail.com>" ]
 license = "MIT"
 description = "runtime library for Cap'n Proto data encoding"