update version and travis ci

Author: danielenricocahall

.travis.yml

@@ -2,9 +2,9 @@ sudo: required
 dist: bionic
 language: python
 python:
-  - "3.6"
   - "3.7"
   - "3.8"
+  - "3.9"
 before_install:
   - sudo add-apt-repository -y ppa:openjdk-r/ppa
   - sudo apt-get -qq update

setup.py

@@ -2,17 +2,17 @@
 from setuptools import find_packages
 
 setup(name='elephas',
-      version='3.1.0',
+      version='3.2.0',
       description='Deep learning on Spark with Keras',
       url='http://github.com/maxpumperla/elephas',
-      download_url='https://github.com/maxpumperla/elephas/tarball/3.1.0',
+      download_url='https://github.com/maxpumperla/elephas/tarball/3.2.0',
       author='Daniel Cahall',
       author_email='[email protected]',
       install_requires=['cython',
                         'tensorflow>=2,!=2.2.*',
                         'flask',
                         'h5py==3.3.0',
-                        'pyspark==3.2'],
+                        'pyspark<3.4'],
       extras_require={
         'tests': ['pytest', 'pytest-pep8', 'pytest-cov', 'pytest-spark', 'mock']
     },