feat: update go and k6 version

.github/workflows/go.yml

@@ -2,9 +2,9 @@ name: Go
 
 on:
   push:
-    branches: [ main, remake_apis ]
+    branches: [ main ]
   pull_request:
-    branches: [ main, remake_apis ]
+    branches: [ main ]
 
 jobs:
   build_n_test:
@@ -15,7 +15,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: 1.18
+        go-version: '1.20'
 
     - name: Install xk6
       run: go install go.k6.io/xk6/cmd/xk6@latest
@@ -47,7 +47,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: '1.20'
       - uses: actions/checkout@v3
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3

.golangci.yml

@@ -75,4 +75,5 @@ linters:
   - stylecheck
   - funlen
   - gocognit
-  fast: false
+  - depguard
+  fast: false

README.md

@@ -5,15 +5,95 @@ This is a [k6](https://go.k6.io/k6) extension using the [xk6](https://github.com
 | :exclamation: This is a proof of concept, isn't supported by the k6 team, and may break in the future. USE AT YOUR OWN RISK! |
 | ---------------------------------------------------------------------------------------------------------------------------- |
 
-This project is a k6 extension that can be used to load test Mqtt. Per each connection to Mqtt, many messages can be sent. These messages are an array of strings. There is also a consumer for testing purposes, i.e. to make sure you send the correct data to Mqtt. The consumer is not meant to be used for testing Mqtt under load.
-
-In order to build the source, you should have the latest version of Go (go1.15) installed. I recommend you to have [gvm](https://github.com/moovweb/gvm) installed.
+This project is a k6 extension that can be used to load test Mqtt.
+Per each connection to Mqtt, many messages can be sent. These messages are an array of strings.
+There is also a consumer for testing purposes, i.e. to make sure you send the correct data to Mqtt.
+The consumer is not meant to be used for testing Mqtt under load.
 
 ## k6 version
 
-This extension is uptodate with k6 version v0.38.0 (breaking change) previous version is tagged at tag v0.37.0
+This extension is tested with k6 version `v0.43.1` last release is [v0.39.2](https://github.com/pmalhaire/xk6-mqtt/releases/tag/v0.39.2).
+
+
+## Build & Run
+
+If you want to contribute and improve this extension (you are welcome !) see Build for development section.
+
+If your are only interrested to use this extension and write your own js tests this section is for you.
+It only requieres docker.
+
+Run the following commands.
+
+```bash
+# 1. Create path for k6 (here my_k6_path)
+mkdir my_k6_path
+# 2. Build the k6 binary including the extension in the current path with
+docker run --rm -it -u "$(id -u):$(id -g)" -v "${PWD}:/xk6" grafana/xk6 build v0.43.1 --with github.com/pmalhaire/xk6-mqtt@v0.39.1
+# 3. Run a sample mqtt server
+docker run --rm --name mosquitto -d -p 1883:1883 eclipse-mosquitto mosquitto -c /mosquitto-no-auth.conf
+# 4. Get a test sample test.js file
+wget -O test.js https://raw.githubusercontent.com/pmalhaire/xk6-mqtt/main/examples/test.js
+# 5. Run the test for 10s
+./k6 run --vus 50 --duration 10s test.js
+```
+
+Your extension is working.
+
+You are ready to customize
+- replace the `mqtt server` you want to test (step 3)
+- write the specifics things you want to test in your `my_test.js` file (step 4)
+
+
+sample output:
+
+```bash
+./k6 run --vus 50 --duration 10s test.js
+
+          /\      |‾‾| /‾‾/   /‾‾/
+     /\  /  \     |  |/  /   /  /
+    /  \/    \    |     (   /   ‾‾\
+   /          \   |  |\  \ |  (‾)  |
+  / __________ \  |__| \__\ \_____/ .io
+
+  execution: local
+     script: test.js
+     output: -
+
+  scenarios: (100.00%) 1 scenario, 50 max VUs, 40s max duration (incl. graceful stop):
+           * default: 50 looping VUs for 10s (gracefulStop: 30s)
+
 
-## Build
+     ✓ is publisher connected
+     ✓ is subcriber connected
+     ✓ is sent
+     ✓ message received
+     ✓ is content correct
+
+     █ teardown
+
+     checks.........................: 100.00% ✓ 447007        ✗ 0
+     data_received..................: 0 B     0 B/s
+     data_sent......................: 0 B     0 B/s
+     iteration_duration.............: avg=12.31ms min=514.49µs med=3.36ms max=79.2ms p(90)=44.25ms p(95)=46.17ms
+     iterations.....................: 40637   4044.417556/s
+     mqtt.received.bytes............: 5253945 522901.478829/s
+     mqtt.received.messages.count...: 121911  12133.252667/s
+     mqtt.sent.bytes................: 5253945 522901.478829/s
+     mqtt.sent.messages.count.......: 121911  12133.252667/s
+     vus............................: 50      min=50          max=50
+     vus_max........................: 50      min=50          max=50
+
+
+running (10.0s), 00/50 VUs, 40637 complete and 0 interrupted iterations
+default ✓ [======================================] 50 VUs  10s
+```
+
+## Build for development
+
+If you need to edit the code of this extension.
+
+You should have the latest version of Go (go1.20) installed.
+I recommend you to have [gvm](https://github.com/moovweb/gvm) installed.
 
 To build a `k6` binary with this extension, first ensure you have the prerequisites:
 
@@ -27,12 +107,7 @@ Then, install [xk6](https://github.com/grafana/xk6) and build your custom k6 bin
   $ go install go.k6.io/xk6/cmd/xk6@latest
   ```
 
-2. Build the binary: from latest version
-  ```shell
-  $ xk6 build --with github.com/pmalhaire/xk6-mqtt@latest
-  ```
-
-3. Build the binary: from source code
+    Build the binary: from source code
   ```shell
   git clone github.com/pmalhaire/xk6-mqtt
   cd xk6-mqtt