Fix doc/make.jl, add Compat bound for Documenter

Author: fingolfin

Diff for: docs/Project.toml

@@ -1,2 +1,6 @@
 [deps]
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+FoldingTrees = "1eca21be-9b9b-4ed8-839a-6d8ae26b1781"
+
+[compat]
+Documenter = "1"

Diff for: docs/make.jl

@@ -1,15 +1,14 @@
-using Documenter, FoldingTrees
+using Documenter
+using FoldingTrees
 
 makedocs(;
+    sitename="FoldingTrees.jl",
     modules=[FoldingTrees],
     format=Documenter.HTML(),
     pages=[
         "Home" => "index.md",
     ],
-    repo="https://github.com/JuliaCollections/FoldingTrees.jl/blob/{commit}{path}#L{line}",
-    sitename="FoldingTrees.jl",
     authors="Tim Holy <[email protected]>",
-    assets=String[],
 )
 
 deploydocs(;