add format checks

Author: Pascal Post

README.md

@@ -33,7 +33,7 @@ The validator currently uses C++ regex implementation for pattern matching, requ
   - [x] enum.json
   - [x] exclusiveMaximum.json
   - [x] exclusiveMinimum.json
-  - [ ] format.json
+  - [x] format.json
   - [x] if-then-else.json
   - [ ] infinite-loop-detection.json
   - [x] items.json

src/test_suite.zig

@@ -67,6 +67,7 @@ test "run test suite" {
         "default.json",
         "propertyNames.json",
         "dependencies.json",
+        "format.json",
         // "ref.json",
         // "WIP.json",
     };