Alpine's QT packages are at 5.10 as well, see #1458. Building binary packages is going to take some time, I'm on it.
Add qt5-qtbase with OpenGL ES2 enabled and adjust the upstream compatibility test case. * Test case: don't get the qt5-qtbase version from any APKINDEX, but only from Alpine's community APKINDEX * Test case: If the pkgver is 9999, look at _pkgver