Test RAPIDS 26.2.0 (#89)

Bumps our RAPIDS pin from 25.12.0 to 26.2.0

Author: TomAugspurger

scripts/install.sh

@@ -10,8 +10,8 @@ RAPIDS_PY_CUDA_SUFFIX=$(echo "cu${RAPIDS_CUDA_VERSION:-12.15.1}" | cut -d '.' -f
 
 # Controls which branch of rapids libraries give us the tests.
 export RAPIDS_BRANCH="main"
-export RAPIDS_VERSION_RANGE=">=25.12.0a0,<26.0.0a0"
-export UCXX_VERSION_RANGE=">=0.47.0a0,<0.48.0a0"
+export RAPIDS_VERSION_RANGE=">=26.2.0a0,<26.4.0a0"
+export UCXX_VERSION_RANGE=">=0.48.0a0,<0.49.0a0"
 
 
 # scipy pinned to <1.16.0 to avoid deprecation warnings -> errors.