Update README to mention 7.3.0 and new ABI tags

Author: YannickJadoul

README.rst

@@ -14,6 +14,10 @@ the only supported platform is ``x86_64``.
 At the moment of writing, this image provide the following versions of
 PyPy:
 
+- PyPy2.7 7.3.0
+
+- PyPy3.6 7.3.0
+
 - PyPy2.7 7.2.0
 
 - PyPy3.6 7.2.0
@@ -41,38 +45,39 @@ also symlinked to ``/opt/python``. Moreover, each installation of PyPy
 contains also a ``python`` symlink.
 
 All the following commands are equivalent and run the PyPy 2.7, version
-7.1.1. You can use whatever fits best in your build system:
+7.3.0. You can use whatever fits best in your build system:
 
-- ``/opt/pypy/pypy2.7-7.1.1/bin/pypy``
+- ``/opt/pypy/pypy2.7-7.3.0/bin/pypy``
 
-- ``/opt/pypy/pypy2.7-7.1.1/bin/python``
+- ``/opt/pypy/pypy2.7-7.3.0/bin/python``
 
-- ``/opt/python/pp271-pypy_41/bin/pypy``
+- ``/opt/python/pp273-pypy_73/bin/pypy``
 
-- ``/opt/python/pp271-pypy_41/bin/python``
+- ``/opt/python/pp273-pypy_73/bin/python``
 
-Similarly, these are the commands to run PyPy 3.6, version 7.1.1:
+Similarly, these are the commands to run PyPy 3.6, version 7.3.0:
 
-- ``/opt/pypy/pypy3.6-7.1.1/bin/pypy``
+- ``/opt/pypy/pypy3.6-7.3.0/bin/pypy``
 
-- ``/opt/pypy/pypy3.6-7.1.1/bin/python``
+- ``/opt/pypy/pypy3.6-7.3.0/bin/python``
 
-- ``/opt/python/pp371-pypy3_71/bin/pypy``
+- ``/opt/python/pp373-pypy36_pp73/bin/pypy``
 
-- ``/opt/python/pp371-pypy3_71/bin/python``
+- ``/opt/python/pp373-pypy36_pp73/bin/python``
 
 
 PEP 425 Compatibility tags
 ---------------------------
 
-``pp271-pypy_41`` and ``pp371-pypy3_71`` are the `PEP 425`_ compliant
+``pp273-pypy_73`` and ``pp373-pypy36_pp73`` are the `PEP 425`_ compliant
 compatibility tag. In particular:
 
 - ``pp`` stands for PyPy (as opposed to ``cp`` which is CPython)
 
-- ``271`` and ``371`` mean "Python [2|3]", "PyPy 7.1.x".
+- ``273`` and ``373`` mean "Python [2|3]", "PyPy 7.3.x".
 
-- ``pypy_41`` and ``pypy3_71`` are the binary ABI tags for the relevant
-  version of PyPy. You can probably ignore them.
+- ``pypy_73`` and ``pypy36_pp73`` (or before PyPy 7.3.0, ``pypy_41`` and
+  ``pypy3_71``) are the binary ABI tags for the relevant version of PyPy.
+  You can probably ignore them.
 
 .. _`PEP 425`: https://www.python.org/dev/peps/pep-0425/