Add throws IOException for JsonParser.isNaN(); should have been added originally

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/core/JsonParser.java

@@ -1057,7 +1057,7 @@ public int currentTokenId() {
      *
      * @since 2.9
      */
-    public boolean isNaN() {
+    public boolean isNaN() throws IOException {
         return false;
     }
 

src/main/java/com/fasterxml/jackson/core/util/JsonParserDelegate.java

@@ -122,7 +122,7 @@ public JsonParser overrideFormatFeatures(int values, int mask) {
     @Override public JsonStreamContext getParsingContext() { return delegate.getParsingContext(); }
     @Override public boolean isExpectedStartArrayToken() { return delegate.isExpectedStartArrayToken(); }
     @Override public boolean isExpectedStartObjectToken() { return delegate.isExpectedStartObjectToken(); }
-    @Override public boolean isNaN() { return delegate.isNaN(); }
+    @Override public boolean isNaN() throws IOException { return delegate.isNaN(); }
 
     /*
     /**********************************************************