Added win32 to the build matrix#457

Merged

florimondmanca merged 6 commits intoencode:masterfrom

cansarigol:win32-travis

Oct 9, 2019

Commits on Oct 6, 2019

Added win32 to the build matrix
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removed os: linux due to travis default
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chopped empty line
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applied only python 3.7 tests on Windows
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Commits on Oct 9, 2019

added desc for windows allow failures
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removed duplicate desc
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