add Python 3.8 to Travis build matrix

.travis.yml

@@ -286,6 +286,23 @@ matrix:
         - TEST_DEPENDS=numpy==1.14.5
       cache:
         directories: $HOME/.ccache
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.8
+        - ENABLE_CONTRIB=0
+        - ENABLE_HEADLESS=0
+        - TEST_DEPENDS=numpy==1.17.3
+      cache:
+        directories: $HOME/.ccache
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.8
+        - PLAT=i686
+        - ENABLE_CONTRIB=0
+        - ENABLE_HEADLESS=0
+        - TEST_DEPENDS=numpy==1.17.3
+      cache:
+        directories: $HOME/.ccache
 
     # headless builds for Linux
     - os: linux
@@ -369,6 +386,23 @@ matrix:
         - TEST_DEPENDS=numpy==1.14.5
       cache:
         directories: $HOME/.ccache
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.8
+        - ENABLE_CONTRIB=0
+        - ENABLE_HEADLESS=1
+        - TEST_DEPENDS=numpy==1.17.3
+      cache:
+        directories: $HOME/.ccache
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.8
+        - PLAT=i686
+        - ENABLE_CONTRIB=0
+        - ENABLE_HEADLESS=1
+        - TEST_DEPENDS=numpy==1.17.3
+      cache:
+        directories: $HOME/.ccache
 
     # contrib builds for Linux
     - os: linux
@@ -452,6 +486,23 @@ matrix:
         - ENABLE_HEADLESS=0
       cache:
         directories: $HOME/.ccache
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.8
+        - TEST_DEPENDS=numpy==1.17.3
+        - ENABLE_CONTRIB=1
+        - ENABLE_HEADLESS=0
+      cache:
+        directories: $HOME/.ccache
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.8
+        - PLAT=i686
+        - TEST_DEPENDS=numpy==1.17.3
+        - ENABLE_CONTRIB=1
+        - ENABLE_HEADLESS=0
+      cache:
+        directories: $HOME/.ccache
 
 
     # headless contrib builds for Linux
@@ -536,6 +587,23 @@ matrix:
         - ENABLE_HEADLESS=1
       cache:
         directories: $HOME/.ccache
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.8
+        - TEST_DEPENDS=numpy==1.17.3
+        - ENABLE_CONTRIB=1
+        - ENABLE_HEADLESS=1
+      cache:
+        directories: $HOME/.ccache
+    - os: linux
+      env:
+        - MB_PYTHON_VERSION=3.8
+        - PLAT=i686
+        - TEST_DEPENDS=numpy==1.17.3
+        - ENABLE_CONTRIB=1
+        - ENABLE_HEADLESS=1
+      cache:
+        directories: $HOME/.ccache
 
 # The first line is printed in the folding header in Travis output
 before_install: |

setup.py

@@ -28,6 +28,8 @@ def main():
         minimum_supported_numpy = "1.11.3"
     if sys.version_info[:2] >= (3, 7):
         minimum_supported_numpy = "1.14.5"
+    if sys.version_info[:2] >= (3, 8):
+        minimum_supported_numpy = "1.17.3"
 
     numpy_version = get_or_install("numpy", minimum_supported_numpy)
     get_or_install("scikit-build")