[issue30947] Update embeded copy of libexpat from 2.2.1 to 2.2.3

[STINNER Victor]

Changes by STINNER Victor <victor.stinner at gmail.com>:


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title: Update embeded copy of libexpat to 2.2.2 -> Update embeded copy of libexpat from 2.2.1 to 2.2.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30947>
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