Add osx wasm jobs to ci (#101)

Author: mcbarton

.github/workflows/main.yml

@@ -181,13 +181,24 @@ jobs:
 
   emscripten_wasm:
 
-    runs-on: ubuntu-24.04
+    runs-on: ${{ matrix.os }}
 
     strategy:
       fail-fast: false
       matrix:
-        emsdk_ver: ["3.1.45"]
-        micromamba_shell_init: ["bash"]
+        include:
+          - name: ubu24
+            os: ubuntu-24.04
+            emsdk_ver: "3.1.45"
+            micromamba_shell_init: bash
+          - name: osx13-x86
+            os: macos-13
+            emsdk_ver: "3.1.45"
+            micromamba_shell_init: bash
+          - name: osx14-arm
+            os: macos-14
+            emsdk_ver: "3.1.45"
+            micromamba_shell_init: bash
 
     steps:
       - uses: actions/checkout@v4