packaging: update the certifi dependency

Not sure if this helps with recent certificate issues[1], but we might as well
keep this modern.

Note that certifi no longer claims py2 support, and there's a PR to add it back
in[2].  Py2 support was dropped in 2020.04.05.2 (which predates what's being
updated here).  None of the *.py files have changed since the 2020.6.20 release,
and I was able to call `certifi.where()` in both a virtualenv and with
`hg debugshell` from an MSI install with this version, so we shouldn't be any
worse off than before.

[1] https://foss.heptapod.net/mercurial/tortoisehg/thg/-/issues/5745
[2] https://github.com/certifi/python-certifi/pull/154

Differential Revision: https://phab.mercurial-scm.org/D11609

contrib/automation/requirements.txt

@@ -37,9 +37,9 b' botocore==1.12.243 \\'
     --hash=sha256:397585a7881230274afb8d1877ef69a661b0a311745cd324f14a052fb2a2863a \
     --hash=sha256:4496f8da89cb496462a831897ad248e13e431d9fa7e41e06d426fd6658ab6e59 \
     # via boto3, s3transfer
-certifi==2019.9.11 \
-    --hash=sha256:e4f3620cfea4f83eedc95b24abd9cd56f3c4b146dd0177e83a21b4eb49e21e50 \
-    --hash=sha256:fd7c7c74727ddcf00e9acd26bba8da604ffec95bf1c2144e67aff7a8b50e6cef \
+certifi==2021.5.30 \
+    --hash=sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee \
+    --hash=sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8 \
     # via requests
 cffi==1.12.3 \
     --hash=sha256:041c81822e9f84b1d9c401182e174996f0bae9991f33725d059b771744290774 \

contrib/packaging/requirements-windows-py2.txt

@@ -4,9 +4,9 b''
 #
 #    pip-compile --generate-hashes --output-file=contrib/packaging/requirements-windows-py2.txt contrib/packaging/requirements-windows.txt.in
 #
-certifi==2020.6.20 \
-    --hash=sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3 \
-    --hash=sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41 \
+certifi==2021.5.30 \
+    --hash=sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee \
+    --hash=sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8 \
     # via dulwich
 configparser==4.0.2 \
     --hash=sha256:254c1d9c79f60c45dfde850850883d5aaa7f19a23f13561243a050d5a7c3fe4c \

contrib/packaging/requirements-windows-py3.txt

@@ -16,9 +16,9 b' cached-property==1.5.2 \\'
     --hash=sha256:9fa5755838eecbb2d234c3aa390bd80fbd3ac6b6869109bfc1b499f7bd89a130 \
     --hash=sha256:df4f613cf7ad9a588cc381aaf4a512d26265ecebd5eb9e1ba12f1319eb85a6a0 \
     # via pygit2
-certifi==2020.6.20 \
-    --hash=sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3 \
-    --hash=sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41 \
+certifi==2021.5.30 \
+    --hash=sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee \
+    --hash=sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8 \
     # via dulwich
 cffi==1.14.4 \
     --hash=sha256:00a1ba5e2e95684448de9b89888ccd02c98d512064b4cb987d48f4b40aa0421e \