Use extras_require for a full installation

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

Author: pombredanne

setup.cfg

@@ -31,28 +31,31 @@ keywords =
 [options]
 package_dir=
     =src
-packages=find:
+packages = find:
 include_package_data = true
 zip_safe = false
 install_requires =
     commoncode >= 21.1
     plugincode >= 20.09
     typecode >= 21.1
-    typecode-libmagic >= 5.39.1.1
     patch >= 1.15
-    extractcode-7z >= 16.5
-    extractcode-libarchive >= 3.4.3
 
 setup_requires = setuptools_scm[toml] >= 4
 
 [options.packages.find]
 where=src
 
 [options.extras_require]
+full =
+    extractcode_7z
+    extractcode_libarchive
+    typecode[full] >= 21.1
+
 testing =
     # upstream
     pytest >= 6
     pytest-xdist >= 2
+
 docs=
     Sphinx>=3.3.1
     sphinx-rtd-theme>=0.5.0