Update PineAPPL version to v1

[Radonirinaunimi]

For the time being, this is primarily needed because pineko (NNPDF/pineko#206) depends on it. This does not introduce physic's changes yet, ie still does not allow for an arbitrary number of convolutions.

[scarlehoff]

sorry, wouldn't it be better to instead of having a branch here just for the pineko dev branch, to remove for now nnpdf from the pineko dev branch?

Or do you need nnpdf there?

[Radonirinaunimi]

sorry, wouldn't it be better to instead of having a branch here just for the pineko dev branch, to remove for now nnpdf from the pineko dev branch?

Or do you need nnpdf there?

Yes, nnpdf would be needed there, not only for some tests (which I'd like all of them to pass) but also to fully test that the evolution pipeline is working perfect. But also, as soon as v1 is available, we'll need to upgrade asap anyway in order to get rid of the reliance on the PineAPPL metadata (and ofc a bit later on to generalize to arbitrary convolution).

[scarlehoff]

ok then! I've left some small comments, although it is WIP I thought better to mention these small points sooner rather than later.

Just one question, in principle old fktables we will always be able to read, right?

[Radonirinaunimi]

ok then! I've left some small comments, although it is WIP I thought better to mention these small points sooner rather than later.

Thanks for the comments @scarlehoff!

Just one question, in principle old fktables we will always be able to read, right?

Yes, old FK tables will still be read as before perfectly. The only difference is that now when PineAPPL reads these FK tables it'll add onto them the new attributes (for e.g. convolutions) .