Prepare release 4.0

Switch from highchart.js -> chart.js
and code cleanup

.github/workflows/pr-version-check.yml

@@ -24,7 +24,8 @@ jobs:
           # read version from file: ZonPHP/inc/version_info.php of master branch
           MASTER_VERSION=$( grep '$version = ' ZonPHP/inc/version_info.php | cut -d '"' -f 2 )
           echo "MASTER_VERSION --> $MASTER_VERSION"
-          if [ "$HEAD_VERSION" \> "$MASTER_VERSION" ]; then
+          #if [ "$HEAD_VERSION" \> "$MASTER_VERSION" ]; then
+          if [ "$(printf '%s\n' "$HEAD_VERSION" "$MASTER_VERSION" | sort -V | head -n 1)" != "$HEAD_VERSION" ]; then
             echo "Great job, master version $MASTER_VERSION will become $HEAD_VERSION soon"                    
           else
             echo "Head $HEAD_VERSION not updated before merging into master"

EMU/Exporter.php

@@ -34,4 +34,4 @@
 file_get_contents(trim($pvOutputURL));
 mysqli_query($mysqli,$sql)or die ('SQL Error fout:'. mysqli_error($mysqli));
 }
-?>
+

EMU/index.php

@@ -4,4 +4,3 @@
 
 header('Location: ../index.php');
 
-?>

README.md

@@ -1,24 +1,23 @@
 # ZonPHP
 ## PHP Solar Logger
 
-Based on the version from Slaper and Rally 
-I decided to build an new version without Adobe FLASH so it can be used 
+Based on the initial version from Slaper and Rally 
+I have continued and enhanced the project. The current version supports PHP8 and can be used
 on mobiles and tablets as well.
 
 ![index.png](resources%2Findex.png)
 
-I replaced all charts with new JavaScript charts using http://www.highcharts.com/ 
-and refactored the PHP code to support PHP8.
+Major changes in release 4 is the replacement of highchart with chart.js ( https://www.chartjs.org/)
 
 If you have any feedback or questions, please contact me at https://github.com/seehase/ZonPHP/issues
 
 ### Day-View
 ![img|320x271](resources%2Fday_view.png)
+![img.png](img.png)
 
 
 ### All years per month view
 ![all_years.png](resources%2Fall_years.png)
 
 ## download
 * last stable version [download](https://github.com/seehase/ZonPHP/archive/master.zip)
-* current development version: [download](https://github.com/seehase/ZonPHP/archive/development.zip)