Update install requirements setup.cfg

We use typecode and need the [full] extra as a dependency

Reference: #2
Reported-by: Anthony Harrison <anthony.p.harrison@gmail.com>
Signed-off-by: Philippe Ombredanne <pombredanne@nexb.com>

setup.cfg

@@ -48,7 +48,7 @@ install_requires =
     attrs
     pyelftools
     commoncode
-    typecode
+    typecode[full]
 
 [options.packages.find]
 where = src