CompatHelper: bump compat for "DataFrames" to "0.21" (#22)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

Project.toml

@@ -3,32 +3,32 @@ uuid = "80307280-efb2-5c5d-af8b-a9c15821677b"
 version = "0.6.3"
 
 [deps]
-Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
+DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
+Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"
+FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"
+FixedEffectModels = "9d5cd8c9-2029-5cab-9928-427838db53e3"
+FixedEffects = "c8885935-8500-56a7-9867-7708b20db0eb"
+LeastSquaresOptim = "0fc2ff8b-aaa3-5acd-a817-1944a5e08891"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
-Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"
-FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"
+Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 StatsModels = "3eaba693-59b7-5ba5-a881-562e759f1c8d"
 Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
-DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
-FixedEffects = "c8885935-8500-56a7-9867-7708b20db0eb"
-FixedEffectModels = "9d5cd8c9-2029-5cab-9928-427838db53e3"
-LeastSquaresOptim = "0fc2ff8b-aaa3-5acd-a817-1944a5e08891"
 
 [compat]
-julia = "1"
-Reexport = "0"
+DataFrames = "0.19, 0.20, 0.21"
 Distributions = "0"
 FillArrays = "0"
+FixedEffectModels = "0.10.3, 0.10.4"
+FixedEffects = "0.7"
+LeastSquaresOptim = "0.7"
+Reexport = "0"
 StatsBase = "0"
 StatsModels = "0.6"
 Tables = "0, 1"
-DataFrames = "0.19, 0.20"
-FixedEffects = "0.7"
-FixedEffectModels = "0.10.3, 0.10.4"
-LeastSquaresOptim = "0.7"
+julia = "1"
 
 [extras]
 CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"