Update setup.py

automatically pull version from tag

setup.py

@@ -1,12 +1,25 @@
 from setuptools import find_packages, setup
+import subprocess
 
 with open("README.md", "r") as fh:
     long_description = fh.read()
 
+# get all the git tags from the cmd line that follow our versioning pattern
+git_tags = subprocess.Popen(
+    ["git", "tag", "--list", "v*[0-9]", "--sort=version:refname"],
+    stdout=subprocess.PIPE,
+)
+tags = git_tags.stdout.read()
+git_tags.stdout.close()
+tags = tags.decode("utf-8").split("\n")
+tags.sort()
+
+# PEP 440 won't accept the v in front, so here we remove it, strip the new line and decode the byte stream
+VERSION_FROM_GIT_TAG = tags[-1][1:]
 
 setup(
     name="sig-decomp",
-    version="0.1.1",
+    version=VERSION_FROM_GIT_TAG,
     description="Optimzation-based signal decomposition",
     long_description=long_description,
     long_description_content_type="text/markdown",