Bump defmt to 0.3.0 (#46)

Co-authored-by: Cor <[email protected]>

Author: luctius

Cargo.toml

@@ -44,7 +44,7 @@ default-features = false
 version = "1.1"
 
 [dependencies.defmt]
-version = "0.2.3"
+version = "0.3.0"
 optional = true
 
 [dev-dependencies]