Sheetjs: Format cells when creating xlsx - How to make the text center aligned ?

[Pranamr]

I am trying use "alignment" cell style as shown below. But its not working
B6: {
"t": 's',
"v": this.sapScript.veryhigh_effort,
"s": {
"alignment": {
"horizontal": "center",
"textRotation": 90
}
}}

[SheetJSDev]

We offer this in the Pro compendium. Since companies have paid for the features already, it would be unfair to them if we turned around and made it available as open source. We have a longer comment in a gist.