add github actions ci (#60)
add github actions ci (#60)

* Create ccpp.yml

* add core count

* fix j argument

* add windows attempt 1

* windows 2

* windows 3

* windows 4

* windows 5

* Update ccpp.yml

* windows 7

* macos 1

* windows 8

* Windows 9 i think

* Win

* Win

Webern/MusicXML-Class-Library,Webern/MusicXML-Class-Library,Webern/MusicXML-Class-Library,Webern/MusicXML-Class-Library,Webern/MusicXML-Class-Library