Disable Travis-CI wheel uploading and bump to v0.7.3

Travis-CI default wheels are not suitable for uploading to PyPI (as they can only be installed on a very small number of platforms) and throw an error. Therefore, the uploading of wheels from Travis-CI should be disabled.

.travis.yml

@@ -19,11 +19,3 @@ script:
   - python setup.py install
   - rm -rf ./tksvg
   - python -m nose
-deploy:
-  provider: releases
-  token:
-    secure: "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"
-  file: dist/*.whl
-  edge: true
-  on:
-    tags: true

setup.py

@@ -177,7 +177,7 @@ def copy_to_target(self, target: str):
 
 setup(
     name="tksvg",
-    version="v0.7.2",
+    version="v0.7.3",
     packages=["tksvg"],
     description="SVG support for PhotoImage in Tk 8.6",
     author="The tksvg authors",