fix: align project with upstream layout

binding.gyp

@@ -2,18 +2,34 @@
   "targets": [
     {
       "target_name": "tree_sitter_hcl_binding",
+      "dependencies": [
+        "<!(node -p \"require('node-addon-api').targets\"):node_addon_api_except",
+      ],
       "include_dirs": [
-        "<!(node -e \"require('nan')\")",
-        "src"
+        "src",
       ],
       "sources": [
         "bindings/node/binding.cc",
         "src/parser.c",
-        "src/scanner.c",
       ],
-      "cflags_c": [
-        "-std=c99",
-      ]
+      "variables": {
+        "has_scanner": "<!(node -p \"fs.existsSync('src/scanner.c')\")"
+      },
+      "conditions": [
+        ["has_scanner=='true'", {
+          "sources+": ["src/scanner.c"],
+        }],
+        ["OS!='win'", {
+          "cflags_c": [
+            "-std=c11",
+          ],
+        }, { # OS == "win"
+          "cflags_c": [
+            "/std:c11",
+            "/utf-8",
+          ],
+        }],
+      ],
     }
   ]
-}
+}