update version + docs

README.rst

@@ -12,8 +12,8 @@ html5 compliant codec using ffmpeg.
 Requirements
 ------------
 
--  Wagtail >= 2.5
--  `ffmpeg <https://ffmpeg.org/>`__
+-  Wagtail >= 4.0 (for older wagtail version see the tags)
+-  `ffmpeg <https://ffmpeg.org/>`__ 
 
 Installing
 ----------
@@ -176,4 +176,4 @@ Future features
 
 -  Some docs
 -  Richtext embed
--  Transcoding via amazon service rather than ffmpeg
+-  Transcoding via external service rather than ffmpeg

setup.py

@@ -10,7 +10,7 @@ from setuptools import find_packages, setup  # noqa: E4
 
 setup(
     name='wagtailvideos',
-    version='2.11.1',
+    version='4.0.0',
     description="A wagtail module for uploading and displaying videos in various codecs.",
     long_description=readme,
     author='Neon Jungle',