CompatHelper: add new compat entry for Graphs at version 1, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -1,7 +1,7 @@
 name = "ElectricityNetworkReduction"
 uuid = "8d6c9889-004b-5ffc-a588-babdd84958c6"
-authors = ["Germán Morales-España <german.morales@tno.nl>", " Juan Giraldo Chavarriaga <juan.giraldo@tno.nl>", " Muhammad Numan <muhammad.numan@ucd.ie>", " Ni Wang <ni.wang@tno.nl>"]
 version = "0.1.0"
+authors = ["Germán Morales-España <german.morales@tno.nl>", " Juan Giraldo Chavarriaga <juan.giraldo@tno.nl>", " Muhammad Numan <muhammad.numan@ucd.ie>", " Ni Wang <ni.wang@tno.nl>"]
 
 [deps]
 CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
@@ -26,6 +26,7 @@ XLSX = "fdbf4ff8-1666-58a4-91e7-1b58723a45e0"
 [compat]
 CSV = "0.10"
 DataFrames = "1"
+Graphs = "1"
 HiGHS = "1"
 Ipopt = "1"
 JuMP = "1"