ci: test more node versions (16, 18), fix test result badge in README

Signed-off-by: Kipras Melnikovas <kipras@kipras.org>

Author: kiprasmel

.github/workflows/test.yml

@@ -12,36 +12,32 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
-        node: [12, 14]
+        node: [12, 14, 16, 18]
         experimental: [false]
         exclude:
           - os: macos-latest
             node: 12
+
+            # nodegit binary missing...
+            #
+            # e.g. https://github.com/kiprasmel/git-stacked-rebase/actions/runs/4606760208/jobs/8140453365
+            #
+            # ```
+            # install response status 404 Not Found on
+            # https://axonodegit.s3.amazonaws.com/nodegit/nodegit/nodegit-v0.28.0-alpha.18-node-v108-linux-x64.tar.gz
+            # ```
+            #
+            # see also:
+            # - https://github.com/nodegit/nodegit/issues/1840#issuecomment-943083741
+            # - https://github.com/nodegit/nodegit/issues/1840#issuecomment-1302139622
+          - os: ubuntu-latest
+            node: 18
         include:
           # test macos - for some reason, internet conn fails @ github actions
           - os: macos-latest
             node: 12
             experimental: true
 
-          # - os: ubuntu-latest
-          #   node: 10
-          #   experimental: true
-          # - os: ubuntu-latest
-          #   # v16 should work fine; there're some issues in CI with `krb5-config`
-          #   node: 16
-          #   experimental: true
-          # - os: ubuntu-latest
-          #   node: 18
-          #   experimental: true
-          
-          # # test windows, w/ wanted versions
-          # - os: windows-latest
-          #   node: 12
-          #   experimental: true
-          # - os: windows-latest
-          #   node: 14
-          #   experimental: true
-
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v3

README.md

@@ -47,7 +47,9 @@ dependencies:
 - git
 - a unix-like environment
 - [node.js](https://nodejs.org/en/)
-	- yarn (`npm i -g yarn`)
+	- tested versions: 12 thru 18, except v18 on linux. [see details](https://github.com/kiprasmel/git-stacked-rebase/blob/refactor1/.github/workflows/test.yml).
+		- note that after installing node, you can install version managers, e.g. `npm i -g n`, to easily change node's version.
+- yarn (`npm i -g yarn`)
 
 <!-- REMOVED because i'm dogfooding like never before. use nightly instead. -->
 <!--
@@ -59,6 +61,8 @@ git config --global alias.rr             git-stacked-rebase
 ```
 -->
 
+once satisfied, run:
+
 ```sh
 git clone https://github.com/kiprasmel/git-stacked-rebase
 # or:  git clone git@github.com:kiprasmel/git-stacked-rebase.git
@@ -68,7 +72,7 @@ cd git-stacked-rebase
 ./nightly-setup-and-update.sh
 ```
 
-[![nightly](https://img.shields.io/github/workflow/status/kiprasmel/git-stacked-rebase/tests/nightly?label=nightly)](https://github.com/kiprasmel/git-stacked-rebase/actions/workflows/test.yml)
+[![nightly](https://img.shields.io/github/actions/workflow/status/kiprasmel/git-stacked-rebase/test.yml?label=nightly)](https://github.com/kiprasmel/git-stacked-rebase/actions/workflows/test.yml)
 
 ## Usage