add mac wheels built for 10.9 / 64b only (#46)

* update multibuild

* add macos 10.9 targets

* move MACOSX_DEPLOYMENT_TARGET override out of travis.yml

* no 3.5 build for 10.9. add 3.7 build

Author: robbuckley

.travis.yml

@@ -45,14 +45,22 @@ matrix:
       language: generic
       env:
         - MB_PYTHON_VERSION=3.5
-        - MACOSX_DEPLOYMENT_TARGET=10.6 # since pandas PR24274, mac builds default to 10.9
     - os: osx
       language: generic
       env:
         - MB_PYTHON_VERSION=3.6
-        - MACOSX_DEPLOYMENT_TARGET=10.6 # since pandas PR24274, mac builds default to 10.9
-
-
+    - os: osx
+      language: generic
+      env:
+        - MB_PYTHON_VERSION=3.6
+        - MB_PYTHON_OSX_VER=10.9
+    - os: osx
+      language: generic
+      env:
+        - MB_PYTHON_VERSION=3.7
+        - MB_PYTHON_OSX_VER=10.9
+        - NP_BUILD_DEP="numpy==1.14.5"
+        - NP_TEST_DEP="numpy==1.14.5"
 
 before_install:
     # See:

config.sh

@@ -4,7 +4,12 @@
 function pre_build {
     # Any stuff that you need to do before you start building the wheels
     # Runs in the root directory of this repository.
-    :
+    if [ -n "$IS_OSX" ]; then
+        # Override pandas minimum MACOSX_DEPLOYEMENT_TARGET=10.9 so we can
+        # build for older Pythons
+        # See https://github.com/pandas-dev/pandas/pull/24274
+        export MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET:-$(get_macpython_osx_ver)}
+    fi
 }
 
 function build_wheel {