engine_xdvipdfmx: we require the latest pdf_io crate for the updated C APIs

Author: pkgw

crates/engine_xdvipdfmx/Cargo.toml

@@ -1,4 +1,4 @@
-# Copyright 2021 the Tectonic Project
+# Copyright 2021-2022 the Tectonic Project
 # Licensed under the MIT License.
 
 # See README.md for discussion of features (or lack thereof) in this crate.
@@ -30,4 +30,4 @@ cc = "^1.0.66"
 [package.metadata.internal_dep_versions]
 tectonic_bridge_core = "thiscommit:2021-01-17:fohCh1sh"
 tectonic_errors = "5c9ba661edf5ef669f24f9904f99cca369d999e7"
-tectonic_pdf_io = "thiscommit:2022-03-29:6nizWic"
+tectonic_pdf_io = "thiscommit:2022-10-21:pkYKcMI"