CompatHelper: add new compat entry for PlotThemes at version 3, (keep…

… existing compat) (#9)

Co-authored-by: CompatHelper Julia <compathelper_noreply@julialang.org>
Co-authored-by: Jordi Bolibar <jordi.bolibar@gmail.com>

Project.toml

@@ -15,10 +15,10 @@ ProgressMeter = "92933f4c-e287-5a05-a399-4b506db050ca"
 PyCall = "438e738f-606a-5dbb-bf0a-cddfbfd45ab0"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 Sleipnir = "f5e6c550-199f-11ee-3608-394420200519"
-TimerOutputs = "a759f4b9-e2f1-59dc-863e-4aeb61b1ea8f"
 Tullio = "bc48ee85-29a4-5162-ae0b-a64e1601d4bc"
 
 [compat]
+PlotThemes = "3"
 Infiltrator = "1"
 Plots = "1"
 Tullio = "0.3"