Add CUDA 11.0 classifier to NVIDIA CUDA list (#40)

NVIDIA CUDA 11.0 was [released in May 2020](https://developer.nvidia.com/cuda-toolkit-archive).

Author: angerson

trove_classifiers/__init__.py

@@ -19,6 +19,7 @@
     "Environment :: GPU :: NVIDIA CUDA :: 10.0",
     "Environment :: GPU :: NVIDIA CUDA :: 10.1",
     "Environment :: GPU :: NVIDIA CUDA :: 10.2",
+    "Environment :: GPU :: NVIDIA CUDA :: 11.0",
     "Environment :: GPU :: NVIDIA CUDA :: 2.0",
     "Environment :: GPU :: NVIDIA CUDA :: 2.1",
     "Environment :: GPU :: NVIDIA CUDA :: 2.2",