Eagerness to avoid LazyArtifacts (#444)

* LazyArtifacts compat fix suggested by @staticfloat

* avoid LazyArtifacts via eagerness

Artifacts.toml

@@ -10,7 +10,7 @@
 # println("git-tree-sha1: ", Tar.tree_hash(IOBuffer(inflate_gzip(filename))))
 # from https://julialang.github.io/Pkg.jl/dev/artifacts/
 git-tree-sha1 = "75260d131b693f26e5834adf855f4c35d627348d"
-lazy = true
+lazy = false
 
     [[TestData.download]]
     # this is the SHA from https://osf.io/djaqb/download?version=4

src/MixedModels.jl

@@ -18,6 +18,14 @@ using StatsBase
 using StatsModels
 using Tables
 
+# When we move to 1.6 as the support lower minimum, we should change Artifact.toml to be lazy
+# and add LazyArtifacts to our dependencies
+# @static if VERSION > v"1.6.0-DEV.1588" # the actual bound may be lower
+#     @warn """Loading LazyArtifacts
+#              This will generate a dependency warning until compatibility with Julia 1.4+1.5 is removed"""
+#     using LazyArtifacts
+# end
+
 using LinearAlgebra: BlasFloat, BlasReal, HermOrSym, PosDefException, copytri!
 using Base: Ryu
 using GLM: Link, canonicallink