Update release guide (#253)

* Update release guide

* Update ci.yml (#254)

Removes Java 8, since ELK 0.9.0 no longer supports Java 8.

* add info to create github release before publishing on npm

* update guide

* update release guide with info on how to correctly tag npm versions

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
       matrix:
         node-version: [ 14.x, 16.x, 18.x ]
-        java-version: [ 8, 11, 13, 15, 17 ] 
+        java-version: [ 11, 13, 15, 17 ] 
 
     steps:
     - uses: actions/checkout@v1

README.md

@@ -335,15 +335,23 @@ Afterwards you can find the created files in the `lib` folder.
 Current procedure
 ```bash
 git checkout -b releases/0.x.x
-# Update versions and commit the changes
+# Check that the version numbers are correct, if necessary update versions and commit the changes
 npm install
 npm run build
 npm run test
 # Add ./lib/ directory and commit
 git tag 0.x.x
-# Push release branch an tags to remote
-npm publish
+# Push release branch and tags to remote
+# Create a new release on Github for the new tag and afterwards publish to npm 
+npm publish --tag=latest
 ```
+Afterwards the following version numbers have to be changed to the next release number:
+* `version` in `package.json`,
+* `melk` in `build.gradle`.
+
+## Incorrect npm tags
+Incorrectly tagged versions on npm can be updated with
+`npm dist-tag add elkjs@<version> <latest/next>`.
 
 # Links
 In the following a list of asorted links to other projects and sites that may prove helpful: