fix: fixed example parsing for joi version > 14

Examples are now objects, as per relase 14.0.0. References:

- hapijs/joi#1615
- hapi-swagger/hapi-swagger#540
- hapi-swagger/hapi-swagger#546

index.js

@@ -62,9 +62,9 @@ module.exports = exports = function parse (schema, existingComponents) {
 
 	if (schema._examples.length) {
 		if (schema._examples.length === 1) {
-			swagger.example = schema._examples[0];
+			swagger.example = extractExampleValue(schema._examples[0]);
 		} else {
-			swagger.examples = schema._examples;
+			swagger.examples = schema._examples.map(extractExampleValue);
 		}
 	}
 
@@ -332,6 +332,10 @@ function refDef (type, name) {
 	return { $ref: '#/components/' + type + '/' + name };
 }
 
+function extractExampleValue (example) {
+	return joi.version < '14' ? example : example.value;
+}
+
 // var inspectU = require('util').inspect;
 // function inspect (value) {
 // 		console.error(inspectU(value, { colors: true, depth: 10 }));

tests.js

@@ -317,13 +317,17 @@ suite('swagger converts', (s) => {
 
 	simpleTest(
 		joi.string().example('sel').example('wyn'),
-		{
-			examples: [
-				'sel',
-				'wyn',
-			],
-			type: 'string',
-		}
+		joi.version < '14'
+			? {
+				examples: [
+					'sel',
+					'wyn',
+				],
+				type: 'string',
+			} : {
+				example: 'wyn',
+				type: 'string',
+			}
 	);
 
 	simpleTest(