Update to current meta/config version to keep changes made in

https://github.com/zopefoundation/ZODB/commit/b6f4cd17cd186cb36025aef44e1cd02934d4fb07

.meta.toml

@@ -2,7 +2,7 @@
 # https://github.com/zopefoundation/meta/tree/master/config/pure-python
 [meta]
 template = "pure-python"
-commit-id = "de499940b679dcda1c60b089f30134146da31e9a"
+commit-id = "15807bd13de45b79c7da560a377fe3f22cbc4338"
 
 [python]
 with-windows = true
@@ -67,5 +67,5 @@ additional-config = [
     "- [\"3.8\",   \"py38-pure\"]",
     ]
 additional-exclude = [
-    "- { os: windows, config: [\"pypy2\", \"pypy\"] }",
+    "- { os: windows, config: [\"pypy-2.7\", \"pypy\"] }",
     ]

CONTRIBUTING.md

+<!--
+Generated from:
+https://github.com/zopefoundation/meta/tree/master/config/pure-python
+--> 
+# Contributing to zopefoundation projects
+
+The projects under the zopefoundation GitHub organization are open source and
+welcome contributions in different forms:
+
+* bug reports
+* code improvements and bug fixes
+* documentation improvements
+* pull request reviews
+
+For any changes in the repository besides trivial typo fixes you are required
+to sign the contributor agreement. See
+https://www.zope.dev/developer/becoming-a-committer.html for details.
+
+Please visit our [Developer
+Guidelines](https://www.zope.dev/developer/guidelines.html) if you'd like to
+contribute code changes and our [guidelines for reporting
+bugs](https://www.zope.dev/developer/reporting-bugs.html) if you want to file a
+bug report.

MANIFEST.in

 # Generated from:
 # https://github.com/zopefoundation/meta/tree/master/config/pure-python
+include *.md
 include *.rst
 include *.txt
 include buildout.cfg