CompatHelper: bump compat for DataStructures to 0.19, (keep existing compat) (#253)

* CompatHelper: bump compat for DataStructures to 0.19, (keep existing compat)

* Update Project.toml

* Update ci.yml

---------

Co-authored-by: CompatHelper Julia <compathelper_noreply@julialang.org>
Co-authored-by: George Datseris <datseris.george@gmail.com>

Author: 3 people

.github/workflows/ci.yml

@@ -45,6 +45,7 @@ jobs:
             ${{ runner.os }}-test-
             ${{ runner.os }}-
       - uses: julia-actions/julia-buildpkg@v1
+
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1