Update to 0.19 (fix RHBZ#2137292, fix RHBZ#2220407)

- Unbundle python-appdirs and document bundled python-flexcache

This is the first upstream release that is compatible with numpy in F37
and later.

python-pint.spec

@@ -1,8 +1,11 @@
 Name:           python-pint
-Version:        0.17
+Version:        0.19
 Release:        %autorelease
 Summary:        Physical quantities module
 
+# The entire source is BSD-3-Clause, except:
+#   - pint/_vendor/appdirs.py is MIT, but is unbundled in %%prep
+#   - pint/_vendor/flexcache.py is also BSD-3-Clause
 License:        BSD-3-Clause
 URL:            https://github.com/hgrecco/pint
 Source0:        %{pypi_source Pint}
@@ -22,6 +25,11 @@ constants.}
 %package -n python3-pint
 Summary:        %{summary}
 
+# TODO: Package this separately so it can be devendored/unbundled.
+# pint/_vendor/flexcache.py
+# https://github.com/hgrecco/flexcache
+Provides:       bundled(python3dist(flexcache)) = 0.2
+
 %description -n python3-pint %{_description}
 
 # We omit the “uncertainties” extra because python-uncertainties is not yet
@@ -58,6 +66,18 @@ rm -rvf docs/_themes
 # https://docs.fedoraproject.org/en-US/packaging-guidelines/Python/#_linters
 sed -r -i '/pytest-cov/d' setup.cfg
 
+# Unbundle python-appdirs
+# http://github.com/ActiveState/appdirs
+# Provides:       bundled(python3dist(appdirs)) = 1.4.4
+rm -vf pint/_vendor/appdirs.py
+# Add devendored dependencies back in as regular dependencies
+sed -r -i 's/^setup_requires/install_requires = appdirs\n&/' setup.cfg
+# The find-then-modify pattern keeps us from discarding mtimes on sources that
+# do not need modification.
+find pint -type f -exec \
+    gawk '/^from \.+_vendor import (appdirs)/ { print FILENAME; nextfile }' '{}' '+' |
+  xargs -r -t sed -r -i 's/^from \.+_vendor (import (appdirs))/\1/'
+
 %generate_buildrequires
 # We omit the “uncertainties” extra because python-uncertainties is not yet
 # packaged.