Bump compat for SUNRepresentations to 0.4 (#161)

Widens SUNRepresentations compat from `"0.3"` to `"0.3, 0.4"` in both
root and `test/Project.toml`, plus one ext fix needed for the 0.4 API
change.

### Ext change

SUNRepresentations 0.4 removed the un-parameterized `SUNIrrep(...)`
constructor — it now throws and requires `SUNIrrep{N}(...)`. The
extension was using `SUNIrrep((λ..., 0))` which worked in 0.3 but breaks
in 0.4. Fix: `SUNIrrep{N}((λ..., 0))` — compatible with both 0.3 and
0.4.

`c.I` continues to work in 0.4 via a `Base.getproperty` backwards-compat
shim that returns the weight, so `sector_label` is unchanged.

### Changes

-
ext/GradedArraysSUNRepresentationsExt/GradedArraysSUNRepresentationsExt.jl:
`SUNIrrep((λ..., 0))` → `SUNIrrep{N}((λ..., 0))`
- Project.toml: `SUNRepresentations = "0.3"` → `"0.3, 0.4"`
- test/Project.toml: `SUNRepresentations = "0.3"` → `"0.3, 0.4"`
- Project.toml: version `0.8.4` → `0.8.5`

Smoke-tested locally: the SU tests (`test_sectors.jl`,
`test_fusion_rule.jl`) all pass against SUNRepresentations 0.4.

Author: mtfishman

Project.toml

@@ -1,6 +1,6 @@
 name = "GradedArrays"
 uuid = "bc96ca6e-b7c8-4bb6-888e-c93f838762c2"
-version = "0.8.4"
+version = "0.8.5"
 authors = ["ITensor developers <support@itensor.org> and contributors"]
 
 [workspace]
@@ -45,7 +45,7 @@ LinearAlgebra = "1.10"
 MatrixAlgebraKit = "0.6"
 NamedDimsArrays = "0.15"
 Random = "1.10"
-SUNRepresentations = "0.3"
+SUNRepresentations = "0.3, 0.4"
 SparseArraysBase = "0.9"
 SplitApplyCombine = "1.2.3"
 TensorAlgebra = "0.8, 0.9"

ext/GradedArraysSUNRepresentationsExt/GradedArraysSUNRepresentationsExt.jl

@@ -5,7 +5,7 @@ using SUNRepresentations: SUNIrrep
 
 function GradedArrays.SectorRange{SUNIrrep{N}}(λ::NTuple{M, Int}) where {N, M}
     M + 1 == N || throw(ArgumentError("Length of λ must be N-1 for SU(N) irreps"))
-    return SectorRange(SUNIrrep((λ..., 0)))
+    return SectorRange(SUNIrrep{N}((λ..., 0)))
 end
 GradedArrays.sector_label(c::SUNIrrep) = Base.front(c.I)
 

test/Project.toml

@@ -32,7 +32,7 @@ LinearAlgebra = "1.10"
 MatrixAlgebraKit = "0.6"
 NamedDimsArrays = "0.15"
 Random = "1.10"
-SUNRepresentations = "0.3"
+SUNRepresentations = "0.3, 0.4"
 SafeTestsets = "0.1"
 SparseArraysBase = "0.9"
 Suppressor = "0.2.8"