Merge branch 'toolchain' into 'master'

[toolchain] use 10.9 as minimum requirement

See merge request !16

dependencies/toolchain/activate.sh

@@ -5,7 +5,7 @@ then
     # for Mac OSX
     export CC=gcc
     export CXX=g++
-    export MACOSX_VERSION_MIN="10.7"
+    export MACOSX_VERSION_MIN="10.9"
     export MACOSX_DEPLOYMENT_TARGET="${MACOSX_VERSION_MIN}"
     export CMAKE_OSX_DEPLOYMENT_TARGET="${MACOSX_VERSION_MIN}"
     export CFLAGS="${CFLAGS} -mmacosx-version-min=${MACOSX_VERSION_MIN}"

dependencies/toolchain/meta.yaml

 package:
   name: toolchain
-  version: 2.1.0
+  version: 2.2.0
 
 build:
   number: 0