bump minimum Julia version (#37)

* require Julia v1.8

* require Julia v1.9

* run examples only on Julia 1.10

.github/workflows/CI.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         version:
           - '1'
-          - '1.7'
+          - '1.9'
         os:
           - ubuntu-latest
         include:

Project.toml

@@ -30,4 +30,4 @@ SimpleUnPack = "1"
 SparseArrays = "1.7"
 StaticArrays = "1.5"
 SymbolicIndexingInterface = "0.2, 0.3"
-julia = "1.7"
+julia = "1.9"

test/runtests.jl

@@ -166,18 +166,20 @@ using Aqua: Aqua
         # errors out
         @test true
 
-        cmd = Base.julia_cmd()
-        examples_dir = abspath(joinpath(pkgdir(PositiveIntegrators), "examples"))
-        examples = ["01_example_proddest.jl",
-            "02_example_mpe.jl",
-            "03_example_mprk22.jl",
-            "04_example_problemlibrary.jl"]
-
-        @testset "Example $ex" for ex in examples
-            @info "Testing examples" ex
-            example = joinpath(examples_dir, ex)
-            @test isfile(example)
-            @time run(`$cmd --project=$(examples_dir) $(example)`)
+        if VERSION >= v"1.10"
+            cmd = Base.julia_cmd()
+            examples_dir = abspath(joinpath(pkgdir(PositiveIntegrators), "examples"))
+            examples = ["01_example_proddest.jl",
+                "02_example_mpe.jl",
+                "03_example_mprk22.jl",
+                "04_example_problemlibrary.jl"]
+
+            @testset "Example $ex" for ex in examples
+                @info "Testing examples" ex
+                example = joinpath(examples_dir, ex)
+                @test isfile(example)
+                @time run(`$cmd --project=$(examples_dir) $(example)`)
+            end
         end
     end
 end