Bump patch version, update change log

MabezDev · MabezDev · commit 6f1348c3418f · 2018-08-25T00:33:03.000+01:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "stm32l432xx-hal"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Scott Mabin <MabezDev@gmail.com>"]
 description = "Hardware abstraction layer for the stm32l432xx chips"
 keywords = ["no-std", "stm32l432xx", "stm32l432kc", "embedded", "embedded-hal"]
