Add release checklist

RELEASING.md

@@ -0,0 +1,64 @@
+# Release Checklist
+
+- [ ] Get master to the appropriate code release state.
+      [Travis CI](https://travis-ci.org/hugovk/humanize) and
+      [GitHub Actions](https://github.com/jmoiron/humanize/actions) should be running
+      cleanly for all merges to master.
+      [![Build Status](https://travis-ci.org/hugovk/humanize.svg?branch=master)](https://travis-ci.org/hugovk/humanize)
+      [![GitHub Actions status](https://github.com/jmoiron/humanize/workflows/Test/badge.svg)](https://github.com/jmoiron/humanize/actions)
+
+https://github.com/hugovk/pypistats/commit/801ed41823e96e2511444dac4dfceb3bdcb37201#diff-60cd2f42437b5cb3c2c09391a6f4c54a
+
+* [ ] Start from a freshly cloned repo:
+
+```bash
+cd /tmp
+git clone https://github.com/jmoiron/humanize
+cd humanize
+```
+
+* [ ] (Optional) Create a distribution and release on **TestPyPI**:
+
+```bash
+pip install -U pip setuptools wheel twine keyring
+rm -rf build
+python3 setup.py sdist --format=gztar bdist_wheel
+twine check dist/*
+twine upload --repository-url https://test.pypi.org/legacy/ dist/humanize-1.0.0*
+```
+
+- [ ] (Optional) Check **test** installation:
+
+```bash
+pip uninstall -y humanize
+pip install -U -i https://test.pypi.org/simple/ humanize
+```
+
+* [ ] Tag with the version number:
+
+```bash
+git tag -a 1.0.0 -m "Release 1.0.0"
+```
+
+* [ ] Create a distribution and release on **live PyPI**:
+
+```bash
+pip install -U pip setuptools wheel twine keyring
+rm -rf build
+python3 setup.py sdist --format=gztar bdist_wheel
+twine check dist/*
+twine upload -r pypi dist/humanize-1.0.0*
+```
+
+* [ ] Check installation:
+
+```bash
+pip uninstall -y humanize
+pip install -U humanize
+```
+
+* [ ] Push tag:
+ ```bash
+git push --tags
+```
+* [ ] Edit GitHub release: https://github.com/jmoiron/humanize/releases