Add package web-push to Stackage

[ciukstar]

I am getting the following error when adding web-push to package.yaml in a stack project.

Error: [S-4804]
       Stack failed to construct a build plan.
       
       While constructing the build plan, Stack encountered the following errors. The 'Stack
       configuration' refers to the set of package versions specified by the snapshot (after any
       dropped packages, or pruned GHC boot packages; if a boot package is replaced, Stack prunes
       all other such packages that depend on it) and any extra-deps:
       
       In the dependencies for <my-project>(+dev +library-only):
         * web-push needed, but no version is in the Stack configuration (latest matching version is
           0.3).
       The above is/are needed since <my-project> is a build target.
       
       Some different approaches to resolving some or all of this:
       
         * Recommended action: try adding the following to your extra-deps in
           /<my-project-path>/stack.yaml (project-level configuration):
           
           - web-push-0.3@sha256:3f3993836babe04f06f834ac7efc5ddeb656e28c6b845236a11752594da7a175,2572

Please add package web-push to Stackage (Adding a package).

Thank you.