Update @actions/core for set-env deprecation and add pre-commit config

.pre-commit-config.yaml

@@ -0,0 +1,19 @@
+exclude: public
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.1.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+  - repo: https://github.com/Lucas-C/pre-commit-hooks
+    rev: v1.1.6
+    hooks:
+      - id: forbid-tabs
+  - repo: local
+    hooks:
+      - id: build
+        name: build
+        language: system
+        entry: npm run build
+        pass_filenames: false
+        files: '(\.(tsx?|jsx?)$|^package.json$|^tsconfig.json$)'