Fix ci_prepare

Author: waralex

test/ci_prepare.jl

@@ -1,10 +1,10 @@
 using Pkg
 Pkg.update()
-Pkg.add(PackageSpec(url="https://github.com/plotly/DashBase.jl.git"))
-Pkg.add(PackageSpec(url="https://github.com/plotly/dash-html-components.git", rev="master"))
-Pkg.add(PackageSpec(url="https://github.com/plotly/dash-core-components.git", rev="master"))
-Pkg.add(PackageSpec(url="https://github.com/plotly/dash-table.git", rev="master"))
-Pkg.add(PackageSpec(url="https://github.com/plotly/Dash.jl.git", rev=ENV["CIRCLE_BRANCH"]))
+Pkg.develop(path = ".")
+Pkg.add("DashBase")
+Pkg.add("DashHtmlComponents")
+Pkg.add("DashCoreComponents")
+Pkg.add("DashTable")
 Pkg.add("HTTP")
 Pkg.build("Dash")
 Pkg.build("DashHtmlComponents")