Switch to git repo as dependency (new unique api)

Author: f-bro

Cargo.toml

@@ -9,4 +9,4 @@ version = "0.2.2"
 
 [dependencies]
 cortex-m = "0.1.5"
-linked_list_allocator = "0.4.1"
+linked_list_allocator = {git = "https://github.com/phil-opp/linked-list-allocator.git"}