Extend stack from Base/Compat (#3120)

Author: ararslan

Project.toml

@@ -25,7 +25,7 @@ Unicode = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
 
 [compat]
 CategoricalArrays = "0.10.0"
-Compat = "3.45, 4.1"
+Compat = "3.46, 4.2"
 DataAPI = "1.10"
 InvertedIndices = "1"
 IteratorInterfaceExtensions = "0.1.1, 1"

src/DataFrames.jl

@@ -78,7 +78,6 @@ export AbstractDataFrame,
        select!,
        select,
        semijoin,
-       stack,
        subset,
        subset!,
        transform,
@@ -142,6 +141,13 @@ else
     using Compat: ComposedFunction
 end
 
+if VERSION >= v"1.9.0-DEV.1163"
+    import Base: stack
+else
+    import Compat: stack
+    export stack
+end
+
 include("other/utils.jl")
 include("other/index.jl")