Create x86_64 Linux wheels for Python 3.7

Author: kvalev

.travis.yml

@@ -261,6 +261,12 @@ matrix:
         - ENABLE_CONTRIB=0
         - ENABLE_HEADLESS=0
         - TEST_DEPENDS=numpy==1.11.3
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.7
+        - ENABLE_CONTRIB=0
+        - ENABLE_HEADLESS=0
+        - TEST_DEPENDS=numpy==1.14.5
     - os: linux
       env:
         - MB_PYTHON_VERSION=3.7
@@ -329,6 +335,12 @@ matrix:
         - ENABLE_CONTRIB=0
         - ENABLE_HEADLESS=1
         - TEST_DEPENDS=numpy==1.11.3
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.7
+        - ENABLE_CONTRIB=0
+        - ENABLE_HEADLESS=1
+        - TEST_DEPENDS=numpy==1.14.5
     - os: linux
       env:
         - MB_PYTHON_VERSION=3.7
@@ -397,6 +409,12 @@ matrix:
         - TEST_DEPENDS=numpy==1.11.3
         - ENABLE_CONTRIB=1
         - ENABLE_HEADLESS=0
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.7
+        - TEST_DEPENDS=numpy==1.14.5
+        - ENABLE_CONTRIB=1
+        - ENABLE_HEADLESS=0
     - os: linux
       env:
         - MB_PYTHON_VERSION=3.7
@@ -466,6 +484,12 @@ matrix:
         - TEST_DEPENDS=numpy==1.11.3
         - ENABLE_CONTRIB=1
         - ENABLE_HEADLESS=1
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.7
+        - TEST_DEPENDS=numpy==1.14.5
+        - ENABLE_CONTRIB=1
+        - ENABLE_HEADLESS=1
     - os: linux
       env:
         - MB_PYTHON_VERSION=3.7