Fix issue twine issue with license

Avoid reading the entire license in setup.py as this gets apparently interpreted by twine as the long description. Instead, set license simply to the name of the type of license. See discussion here: pypa/twine#454

setup.py

@@ -59,7 +59,7 @@ def stream_requirements(fd):
         'console_scripts': ['triage = triage.cli:execute'],
     },
     extras_require={'rq': RQ_REQUIREMENTS},
-    license=LICENSE_PATH.read_text(),
+    license="MIT License",
     zip_safe=False,
     keywords='triage',
     classifiers=[