libs: Update qcustomplot to version 2.0.0 released on 04.09.17

Let's see if this fixes the problem about disappearing points while
zooming reported at issue #838.
This commit is contained in:
mgrojo
2017-12-15 18:39:08 +01:00
parent 05559d4727
commit cb9712769e
3 changed files with 1095 additions and 674 deletions

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