Refactored license_expression ina proper module

Signed-off-by: Philippe Ombredanne <pombredanne@nexb.com>

Author: pombredanne

setup.cfg

@@ -1,12 +1,12 @@
 [bdist_wheel]
 universal = 1
 
-[aliases]
-release = clean --all sdist --formats=gztar,zip bdist_wheel register upload
-
 [metadata]
 license_file = NOTICE
 
+[aliases]
+release = clean --all sdist --formats=gztar,zip bdist_wheel register upload
+
 [tool:pytest]
 norecursedirs =
     .git

setup.py

@@ -17,7 +17,7 @@
 
 setup(
     name='license-expression',
-    version='0.8',
+    version='0.9',
     license='apache-2.0',
     description=desc,
     long_description=desc,
@@ -30,7 +30,7 @@
     include_package_data=True,
     zip_safe=False,
     classifiers=[
-        'Development Status :: 4 - Beta',
+        'Development Status :: 4 - Alpha',
         'License :: OSI Approved :: Apache Software License',
         'Intended Audience :: Developers',
         'Operating System :: OS Independent',
@@ -48,6 +48,6 @@
         'licence'
     ],
     install_requires=[
-        'boolean.py',
+        'boolean.py >= 3.2, < 4.0.0',
     ]
 )