Update Cowlib to 2.12.1
diff --git a/Makefile b/Makefile
index f212ed3..33b7a91 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@
 LOCAL_DEPS = ssl
 
 DEPS = cowlib
-dep_cowlib = git https://github.com/ninenines/cowlib 2.12.0
+dep_cowlib = git https://github.com/ninenines/cowlib 2.12.1
 
 DOC_DEPS = asciideck
 
diff --git a/rebar.config b/rebar.config
index b996a2a..c2022b9 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,4 +1,4 @@
 {deps, [
-{cowlib,".*",{git,"https://github.com/ninenines/cowlib","2.12.0"}}
+{cowlib,".*",{git,"https://github.com/ninenines/cowlib","2.12.1"}}
 ]}.
 {erl_opts, [debug_info,warn_export_vars,warn_shadow_vars,warn_obsolete_guard]}.