Documenter version extraction in rundocumenter.jl fails for new manifest format

[mortenpi]

This part

DocumentationGenerator.jl/src/rundocumenter.jl

Lines 26 to 37 in 80b8c21

	documenter_version = v"0.24.10"
	try
	manifest = joinpath(docsdir, "Manifest.toml")
	if isfile(manifest)
	pm = Pkg.TOML.parsefile(manifest)
	global documenter_version = VersionNumber(first(pm["Documenter"])["version"])
	else
	@warn("No Mainfest.toml found at `$(manifest)`. Defaulting to $(documenter_version).")
	end
	catch err
	@error(exception = err)
	end

generally leads to a KeyError("Documenter") because the new Manifest.toml format wraps all the packages in [deps.PackageName]. So we should probably do pm["deps"]["Documenter"] to extract the package (but probably also check manifest_format?).