Simplify the release process (no more build script or release branches) (#281)

* Simplify the release process (no more build script or release branches)

* Remove the `bin/` submodule

* npm run pack

* Use a different YAML syntax

Co-authored-by: Curtis Vogt <curtis.vogt@gmail.com>

* Use simpler (but equivalent) logic

Co-authored-by: Curtis Vogt <curtis.vogt@gmail.com>

* Fix a logic bug

* Remove some job matrices

Co-authored-by: Curtis Vogt <curtis.vogt@gmail.com>

* Intentionally fail a job (to make sure that `finalize` thus also fails)

* Revert "Intentionally fail a job (to make sure that `finalize` thus also fails)"

This reverts commit cd7944ca82.

---------

Co-authored-by: Curtis Vogt <curtis.vogt@gmail.com>

Makefile

@@ -0,0 +1,49 @@
+.NOTPARALLEL:
+
+# This is the default target:
+.PHONY: pack
+pack: build
+	npm run pack
+
+# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+.PHONY: everything-from-scratch
+everything-from-scratch: cleanall install-packages build pack clean
+
+# build does `npm run build`, but does not run `npm run pack`
+.PHONY: build
+build:
+	npm run build
+
+.PHONY: test
+test:
+	npm run test
+
+.PHONY: install-packages
+install-packages:
+	rm -rf node_modules/
+	# Note: we use `npm ci` instead of `npm install`, because we want to make sure
+	# that we respect the versions in the `package-lock.json` lockfile.
+	npm ci
+
+# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+.PHONY: clean
+clean:
+	rm -rf node_modules/
+
+.PHONY: cleanall
+cleanall: clean
+	rm -rf lib/
+	rm -rf dist/
+
+# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+# asdf does not support Windows.
+# On Windows, users need to install the correct version of NodeJS themselves.
+.PHONY: unix-asdf-install
+unix-asdf-install:
+	asdf plugin add nodejs # update this list when we add more tools to `.tool-versions`
+	asdf install
+
+# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++