Use Project.toml [sources] with git URLs instead of CI Pkg.add hacks

Project.toml now specifies:
  [sources]
  LinearAlgebraMPI = {url = "...", rev = "main"}
  MultiGridBarrier = {url = "...", rev = "main"}

This lets Pkg.instantiate() properly resolve dependencies from GitHub
main branches, instead of fighting the package manager with Pkg.add overrides.

Author: Sébastien Loisel

.github/workflows/CI.yml

@@ -57,8 +57,6 @@ jobs:
           julia --project=. -e '
             using Pkg
             Pkg.add(name="OpenSSL_jll", version="3.0")
-            Pkg.add(url="https://github.com/sloisel/LinearAlgebraMPI.jl.git", rev="main")
-            Pkg.add(url="https://github.com/sloisel/MultiGridBarrier.jl.git", rev="main")
             Pkg.instantiate()
             Pkg.build("PyCall")
           '
@@ -132,8 +130,6 @@ jobs:
             using Pkg
             Pkg.develop(PackageSpec(path=pwd()))
             Pkg.add(name="OpenSSL_jll", version="3.0")
-            Pkg.add(url="https://github.com/sloisel/LinearAlgebraMPI.jl.git", rev="main")
-            Pkg.add(url="https://github.com/sloisel/MultiGridBarrier.jl.git", rev="main")
             Pkg.instantiate()
             Pkg.build("PyCall")
           '

Project.toml

@@ -14,8 +14,8 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [sources]
-LinearAlgebraMPI = {path = "/Users/sebastienloisel/Dropbox/2023/Spectral Barrier Method/julia/LinearAlgebraMPI.jl"}
-MultiGridBarrier = {path = "/Users/sebastienloisel/Dropbox/2023/Spectral Barrier Method/julia/MultiGridBarrier.jl"}
+LinearAlgebraMPI = {url = "https://github.com/sloisel/LinearAlgebraMPI.jl.git", rev = "main"}
+MultiGridBarrier = {url = "https://github.com/sloisel/MultiGridBarrier.jl.git", rev = "main"}
 
 [compat]
 BenchmarkTools = "1.6"