Add clang-format to pre-commit hook (#505)

This PR adds clang format to pre-commit hook.

closes #503

Authors:
  - Michael Wang (https://github.com/isVoid)

Approvers:
  - Mark Harris (https://github.com/harrism)
  - Vyas Ramasubramani (https://github.com/vyasr)

URL: #505

.pre-commit-config.yaml

@@ -26,5 +26,19 @@ repos:
                 name: flake8-cython
                 args: ["--config=python/cuspatial/.flake8.cython"]
                 types: [cython]
+      - repo: local
+        hooks:
+              - id: clang-format
+                # Using the pre-commit stage to simplify invocation of all
+                # other hooks simultaneously (via any other hook stage).  This
+                # can be removed if we also move to running clang-format
+                # entirely through pre-commit.
+                stages: [commit]
+                name: clang-format
+                description: Format files with ClangFormat.
+                entry: clang-format -i
+                language: system
+                files: \.(cu|cuh|h|hpp|cpp|inl)$
+                args: ['-fallback-style=none']
 default_language_version:
       python: python3