build: bump ajv from 6.2.1 to 6.3.0 in /template

Bumps [ajv](https://github.com/epoberezkin/ajv) from 6.2.1 to 6.3.0.
- [Release notes](https://github.com/epoberezkin/ajv/releases)
- [Commits](ajv-validator/ajv@v6.2.1...v6.3.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

template/package.json

@@ -84,7 +84,7 @@
     "vuex-router-sync": "^5.0.0"
   },
   "devDependencies": {
-    "ajv": "^6.2.1",
+    "ajv": "^6.3.0",
     "autoprefixer": "^8.1.0",
     "babel-core": "^6.16.0",
     "babel-eslint": "^8.2.2",

template/yarn.lock

@@ -165,9 +165,9 @@ ajv@^5.0.0, ajv@^5.1.0, ajv@^5.2.3, ajv@^5.3.0:
     fast-json-stable-stringify "^2.0.0"
     json-schema-traverse "^0.3.0"
 
-ajv@^6.1.0, ajv@^6.2.1:
-  version "6.2.1"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.2.1.tgz#28a6abc493a2abe0fb4c8507acaedb43fa550671"
+ajv@^6.1.0, ajv@^6.3.0:
+  version "6.3.0"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.3.0.tgz#1650a41114ef00574cac10b8032d8f4c14812da7"
   dependencies:
     fast-deep-equal "^1.0.0"
     fast-json-stable-stringify "^2.0.0"