Try #304:

bors[bot] · web-flow · commit 2565fb109eb2 · 2021-08-04T06:18:22.000Z
diff --git a/Cargo.toml b/Cargo.toml
@@ -19,5 +19,5 @@ version = "1.0.0-alpha.4" # remember to update html_root_url
 nb = "1"
 
 [dev-dependencies.stm32f1]
-version = "0.12"
+version = "0.13"
 features = ["stm32f103", "rt"]
