Examples don't use correct version of ApproximateGPs

[devmotion]

I didn't see any discussion about this so I assume that #99 might have changed it unintentionally and introduced a bug: In contrast to previous behaviour and when e.g. building the documentation, with this PR now examples use the latest compatible released version of ApproximateGPs instead of e.g. the master branch or a PR. So it can happen that examples run fine in a PR but fail as soon as the next release is tagged.

[st--]

Woops, yes, definitely an unintentional bug. Thanks for spotting it!

[st--]

fixed by #119

[devmotion]

That's only a workaround, not a proper fix. The manifest files and package information obtained with the linked PR (which BTW introduced formatting issues and should not have been merged it seems) are not helpful for reproducing the examples. Instead of the development version they should use the corresponding release or commit if run on the master branch.