update all dependencies. separate LTO profile

Cargo.toml

@@ -12,7 +12,11 @@ lto = false
 debug = true
 
 [profile.release]
-# Can be problematic for debugging
-lto = true
+# Can be problematic for debugging and is definitely problematic with RTT
+lto = false
 debug = true
 opt-level = 's'
+
+[profile.release-lto]
+inherits = "release"
+lto = true

jlink-gdb.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+JLinkGDBServer -select USB -device Cortex-M0 -endian little -if JTAG-speed auto \
+  -LocalhostOnly