feat: Added release guide.

Makefile

@@ -56,6 +56,17 @@ release: generate
 	cp -rf README.md release/
 	cp -rf LICENSE-MIT release/
 
+github-release:
+	@echo "${RELEASE}" | grep -q -e "^v" || { echo "Please make sure version starts with \"v\"."; exit 1; }
+	gh release create -d --generate-notes ${RELEASE}
+	@sleep 5
+	gh release view ${RELEASE} -t "{{.body}}" --json body > RELEASE_NOTES
+	gh release delete ${RELEASE} -y
+	gh release create -F RELEASE_NOTES -d --title ${RELEASE} --target release release/${RELEASE}
+	@sleep 5
+	rm -rf RELEASE_NOTES
+	open $$(gh release view release/${RELEASE} --json url -t "{{.url}}")
+
 postversion: release
 	git fetch origin
 	git push
@@ -78,4 +89,4 @@ install: build/libllhttp.a build/libllhttp.so
 	$(INSTALL) -C build/libllhttp.a $(DESTDIR)$(LIBDIR)/libllhttp.a
 	$(INSTALL) build/libllhttp.so $(DESTDIR)$(LIBDIR)/libllhttp.so
 
-.PHONY: all generate clean release
+.PHONY: all generate clean release postversion github-release

docs/releasing.md

@@ -0,0 +1,65 @@
+# How to release a new version of llhttp
+
+## What does releasing involves?
+
+These are the required steps to release a new version of llhttp:
+
+1. Increase the version number.
+2. Build it locally.
+3. Create a new build and push it to GitHub.
+4. Create a new release on GitHub release.
+
+> Do not try to execute the commands in the Makefile manually. This is really error-prone!
+
+## Which commands to run?
+
+First of all, make sure you have [GitHub CLI](https://cli.github.com) installed and configured. While this is not strictly necessary, it will make your life way easier.
+
+As a preliminary check, run the build command and execute the test suite locally:
+
+```
+npm run build
+npm test
+```
+
+If all goes good, you are ready to go!
+
+To release a new version of llhttp, first increase the version using `npm` and make sure it also execute the `postversion` script. Unless you have some very specific setup, this should happen automatically, which means the following command will suffice:
+
+```
+npm version [major|minor|patch]
+```
+
+The command will increase the version and then will create a new release branch on GitHub.
+
+> Even thought there is a package on NPM, it is not updated anymore. NEVER RUN `npm publish`!
+
+It's now time to create the release on GitHub. If you DON'T have GitHub CLI available, skip to the next section, otherwise run the following command:
+
+```
+npm run github-release
+```
+
+This command will create a draft release on GitHub and then show it in your browser so you can review and publish it.
+
+Congratulation, you are all set!
+
+## Create a GitHub release without GitHub CLI
+
+> From now on, `$VERSION` will be the new version you are trying to create, including the leading letter, for instance `v6.0.9`.
+
+If you don't want to or can't use GitHub CLI, you can still create the release on GitHub following this procedure.
+
+1. Go on GitHub and start creating a new release which targets tag `$VERSION`. Generate the notes using the `Generate release notes` button.
+
+2. At the bottom of the generated notes, make sure the previous and current version in the notes are correct.
+
+   The last line should be something like this: `**Full Changelog**: https://github.com/nodejs/llhttp/compare/v6.0.8...v6.0.9`
+
+   In this case it says we are creating release `v6.0.9` and we are showing the changes between `v6.0.8` and `v6.0.9`.
+
+3. Change the target of the release to point to tag `release/$VERSION`.
+
+4. Review and then publish the release.
+
+Congratulation, you are all set!

package.json

@@ -20,7 +20,8 @@
     "lint": "tslint -c tslint.json bin/*.ts src/*.ts src/**/*.ts test/*.ts test/**/*.ts",
     "mocha": "mocha --timeout=10000 -r ts-node/register/type-check --reporter progress test/*-test.ts",
     "test": "npm run mocha && npm run lint",
-    "postversion": "TAG=`node -e \"process.stdout.write(require('./package').version)\"` make -B postversion"
+    "postversion": "TAG=`node -e \"process.stdout.write(require('./package').version)\"` make -B postversion",
+    "github-release": "RELEASE=`node -e \"process.stdout.write('v' + require('./package').version)\"` make github-release"
   },
   "repository": {
     "type": "git",