chore(deps): update devDependency @commitlint/config-conventional to ^7.3.0 (#29)

This PR contains the following updates:

| Package | Type | Update | Change | References |
|---|---|---|---|---|
| @​commitlint/config-conventional | devDependencies | minor | `^7.1.2` -> `^7.3.0` | [source](https://togithub.com/marionebl/commitlint) |

---

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Author: renovate[bot]

package.json

@@ -45,7 +45,7 @@
   "license": "MIT",
   "devDependencies": {
     "@commitlint/cli": "^7.2.1",
-    "@commitlint/config-conventional": "^7.1.2",
+    "@commitlint/config-conventional": "^7.3.0",
     "@commitlint/travis-cli": "^7.2.1",
     "babel-core": "^6.26.3",
     "babel-eslint": "^10.0.1",

yarn.lock

@@ -115,10 +115,10 @@
     resolve-from "^4.0.0"
     resolve-global "^0.1.0"
 
-"@commitlint/config-conventional@^7.1.2":
-  version "7.1.2"
-  resolved "https://registry.yarnpkg.com/@commitlint/config-conventional/-/config-conventional-7.1.2.tgz#5b5e45924c9abd8f9a8d83eb1f66e24e5f66916f"
-  integrity sha512-DmA4ixkpv03qA1TVs1Bl25QsVym2bPL6pKapesALWIVggG3OpwqGZ55vN75Tx8xZoG7LFKrVyrt7kwhA7X8njQ==
+"@commitlint/config-conventional@^7.3.0":
+  version "7.3.0"
+  resolved "https://registry.yarnpkg.com/@commitlint/config-conventional/-/config-conventional-7.3.0.tgz#d76fa88e0a32e3768f103d84cd3413f750ac85d1"
+  integrity sha512-JKhQOfc+brEDUp/nDsNMOur8i1/Mbszd5hSdtUIiQqOjP294V99FrFytxOH4vIsInSrv6xagGxSE8J57wGQRxA==
 
 "@commitlint/ensure@^7.2.0":
   version "7.2.0"