Renamed to elm-messenger/elm-regl. That is where the repository lives now. It has not been published as a package under the new name.
Versions published as linsyking/elm-regl still install under that name. 5 versions of 15 come from the new location (see their notes).
Rerouted (renamed, verified). The GitHub user or repository was renamed. The tag is still there, at the new name. The Lamdera package server serves a copy recovered from https://github.com/elm-messenger/elm-regl.
What we checked: The repo moved to github.com/elm-messenger/elm-regl. Rebuilt with git archive from commit 648b994e4b9c of https://github.com/elm-messenger/elm-regl (zip prefix linsyking-elm-regl-bb235d3/, America/Los_Angeles times): the zip is byte-identical to the one package.elm-lang.org recorded, SHA-1 db7769a46016588823c05ad2e8e7a30e6187a2cf.
The Lamdera compiler uses this copy and prints a one-line notice saying so. elm itself fails to download this version.
Details · package.elm-lang.org's zip: https://github.com/linsyking/elm-regl/zipball/3.0.1/
Render a triangle with three vertices and color.
Render a quad with three vertices and color.
Render a circle with center, radius and color.
Render a poly with vertices, element array, primitives and color.
Render a poly with vertices and color.
Render a textbox.
Render a textbox with more options.
Full TextBox options.
Render a texture with 4 points: left-bottom, right-bottom, right-top and left-top.
Render a texture with left-bottom coordinates and size.
Render a texture with 4 points: left-bottom, right-bottom, right-top and left-top, along with 4 cropped points in texture coordinate.
Render a texture with left-bottom coordinates and size, along with a crop rectangle in texture coordinate.
Render a texture with center, size and angle for rotation.
Render a texture with center, size and angle for rotation.
Render lines with vertices and color.
Render line strip with vertices and color.
Render a line loop with vertices and color.
Render a function curve with a function, offset, range, samples, and color.
Convert a color to a list of RGBA values.
OpenGL primitive types
Convert a primitive to a value.
Save the current FBO as a texture.
This is only an experimental feature and should be used with caution.
Clear the canvas with a color.