Update setup.py to enhance keywords and add license information

Author: Buba98

setup.py

@@ -14,13 +14,15 @@
         'dev': ['pytest', 'pytest-cov'],
     },
     url='https://github.com/Buba98/regex_enumerator',
-    keywords=['regex', 'regex enumerator', 'regular-expression', 'enumerator', 'string-generation',
-              'exhaustive-matching', 'exhaustive-search', 'regex-testing', 'regex-tools', 'string-enumeration', 'data-generation'],
+    keywords=['regex', 'regex enumerator', 'regular expression', 'enumerator', 'string generation',
+              'exhaustive matching', 'exhaustive search', 'regex testing', 'regex tools', 'string enumeration', 'data generation'],
     long_description=long_description,
     long_description_content_type="text/markdown",
     python_requires='>=3.10',
     classifiers=[
         'Programming Language :: Python :: 3.10',
         'Operating System :: OS Independent',
+        'License :: OSI Approved :: MIT License',
     ],
+    license='MIT',
 )