Prepare release.

Rouven Spreckels · Rouven Spreckels · commit a076df58ab9d · 2020-03-31T12:21:27.000+02:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "signifix"
-version = "0.10.0"
+version = "0.10.1"
 edition = "2018"
 authors = [
 	"Rouven Spreckels <n3vu0r@qu1x.org>",
diff --git a/RELEASES.md b/RELEASES.md
@@ -1,3 +1,8 @@
+# Version 0.10.1 (2020-03-31)
+
+  * Use Rust edition `2018`.
+  * Update `err-derive`.
+
 # Version 0.10.0 (2019-04-12)
 
   * Added stable `try_from` support requiring Rust `>= 1.34.0`.
