Upgrade: ajv@^6.0.1, still using json schema draft 04 (#9856)

* Upgrade: ajv@^6.0.1, still using json schema draft 04

* Upgrade: table@^4.0.3 (resolves peer dep warning)

* Chore: Using schemaId: "auto" instead of "id"

This retains compatibility with json schema draft-04 as well as draft-06 and draft-07. Previous setting unintentionally restricted compatibility to draft-04.

lib/util/ajv.js

@@ -19,7 +19,8 @@ const ajv = new Ajv({
     meta: false,
     validateSchema: false,
     missingRefs: "ignore",
-    verbose: true
+    verbose: true,
+    schemaId: "auto"
 });
 
 ajv.addMetaSchema(metaSchema);

package.json

@@ -34,7 +34,7 @@
   "homepage": "https://eslint.org",
   "bugs": "https://github.com/eslint/eslint/issues/",
   "dependencies": {
-    "ajv": "^5.3.0",
+    "ajv": "^6.0.1",
     "babel-code-frame": "^6.26.0",
     "chalk": "^2.1.0",
     "concat-stream": "^1.6.2",
@@ -70,7 +70,7 @@
     "semver": "^5.5.0",
     "strip-ansi": "^4.0.0",
     "strip-json-comments": "^2.0.1",
-    "table": "4.0.2",
+    "table": "^4.0.3",
     "text-table": "^0.2.0"
   },
   "devDependencies": {