ROU-10868 Updated exportToExcel to use saveAsync

[gnbm]

This PR will update the framework method exportToExcel to use book.saveAsync.

What was happening

• With JSZip update to version 3.10.1 the method book.save is not supported by Wijmo Flexgrid since they only support it until version 2.5.0
• Some gulp and eslint dependencies were not compatible.

What was done

• Updated the framework method exportToExcel to use book.saveAsync.
• Updated dev dependencies

Test Steps

1. Go to a screen containing a Data Grid instance
2. Check the resources for JSZip v3.10.1
3. Right-click on a cell
4. Click Export to Excel
5. Checked that it continues to work as expected

Checklist

• tested locally
• documented the code
• clean all warnings and errors of eslint
• requires changes in OutSystems
• requires new sample page in OutSystems

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud