Try adding Python 3.12 builds

.travis.yml

@@ -52,6 +52,8 @@ jobs:
       python: "3.10"
     - arch: arm64
       python: "3.11"
+    - arch: arm64
+      python: "3.12"
 
     # PPC
     # Just build one numpy version on each ppc64 instance to avoid timeouts
@@ -76,6 +78,9 @@ jobs:
     - arch: ppc64le
       python: "3.11"
       script: tox -e "py311-numpy1.26"
+    - arch: ppc64le
+      python: "3.12"
+      script: tox -e "py312-numpy2.0"
 
     # s390x build image has a pip cache permissions problem (except for Python 2.7)
     # List all s390x jobs explicitly with adjusted install scripts
@@ -121,6 +126,11 @@ jobs:
       install:
         - sudo chown -Rv $(id -u):$(id -g) ~/.cache/pip/wheels || true
         - pip install tox-travis
+    - arch: s390x
+      python: "3.12"
+      install:
+        - sudo chown -Rv $(id -u):$(id -g) ~/.cache/pip/wheels || true
+        - pip install tox-travis
 
     # FreeBSD build
     - name: FreeBSD / Python 2.7