Update cortex-m-rt to 0.7.5HEADmain

There's an unreleased commit upstream to support stack painting with
custom memory layouts, like ours. I eagerly defined the _stack_end
symbol. Tested on hardware.

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index bb93245..daf59d0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ device = ["cortex-m-rt/device"]
 cfg-if = "1.0"
 
 [target.'cfg(all(target_arch = "arm", target_os = "none"))'.dependencies]
-cortex-m-rt = { version = "=0.7.3", features = ["set-vtor", "set-sp"] }
+cortex-m-rt = { version = "=0.7.5", features = ["set-vtor", "set-sp"] }
 
 [target.'cfg(all(target_arch = "arm", target_os = "none"))'.dev-dependencies]
 board = { path = "board" }