Deprecate exempi in favour of exempi2

Cargo.toml

 [package]
 name = "exempi"
-version = "2.5.0"
+version = "2.5.1"
 authors = ["Hubert Figuière <hub@figuiere.net>"]
 license = "BSD-2-Clause"
-keywords = ["metadata", "tags", "xmp"]
-description = "Safe Rust bindings to Exempi 2.4."
+keywords = ["deprecated"]
+description = "Deprecated Safe Rust bindings to Exempi 2.4."
 repository = "https://github.com/hfiguiere/exempi-rs"
 homepage = "https://libopenraw.freedesktop.org/exempi/"
 

NEWS

+2.5.1 - 2021/12/05
+
+- Deprecate in favor of `exempi2`
+
 2.5.0 - 2019/09/28
 
 - DateTime now has standard derive Clone and Debug

README

 exempi-rs
 =========
 
+# This crate is deprecated. Use exempi2.
+
 Rust binding for Exempi, an XMP library.
 
 Exempi can be found at http://libopenraw.freedesktop.org/wiki/Exempi/