update to DataFrames 1.0 (#168)

Author: matthieugomez

Project.toml

@@ -1,6 +1,6 @@
 name = "FixedEffectModels"
 uuid = "9d5cd8c9-2029-5cab-9928-427838db53e3"
-version = "1.6.0"
+version = "1.6.1"
 
 [deps]
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
@@ -16,7 +16,7 @@ Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 Vcov = "ec2bfdc2-55df-4fc9-b9ae-4958c2cf2486"
 
 [compat]
-DataFrames = "0.21, 0.22"
+DataFrames = "0.21, 0.22, 1.0"
 FixedEffects = "2"
 Reexport = "0.1, 0.2, 1.0"
 StatsBase = "0.33"