build(deps): bump class-transformer from 0.2.3 to 0.3.1

Bumps [class-transformer](https://github.com/typestack/class-transformer) from 0.2.3 to 0.3.1.
- [Release notes](https://github.com/typestack/class-transformer/releases)
- [Changelog](https://github.com/typestack/class-transformer/blob/develop/CHANGELOG.md)
- [Commits](typestack/class-transformer@v0.2.3...v0.3.1)

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

package.json

@@ -69,7 +69,7 @@
     "@types/node": "12.7.5",
     "@types/qs": "6.5.3",
     "@types/supertest": "2.0.8",
-    "class-transformer": "0.2.3",
+    "class-transformer": "0.3.1",
     "class-validator": "0.10.0",
     "commitizen": "4.0.3",
     "coveralls": "3.0.6",

yarn.lock

@@ -2241,10 +2241,10 @@ ci-info@^2.0.0:
   resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-2.0.0.tgz#67a9e964be31a51e15e5010d58e6f12834002f46"
   integrity sha512-5tK7EtrZ0N+OLFMthtqOj4fI2Jeb88C4CAZPu25LDVUgXJ0A3Js4PMGqrn0JU1W0Mh1/Z8wZzYPxqUrXeBboCQ==
 
-class-transformer@0.2.3:
-  version "0.2.3"
-  resolved "https://registry.yarnpkg.com/class-transformer/-/class-transformer-0.2.3.tgz#598c92ca71dcca73f91ccb875d74a3847ccfa32d"
-  integrity sha512-qsP+0xoavpOlJHuYsQJsN58HXSl8Jvveo+T37rEvCEeRfMWoytAyR0Ua/YsFgpM6AZYZ/og2PJwArwzJl1aXtQ==
+class-transformer@0.3.1:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/class-transformer/-/class-transformer-0.3.1.tgz#ee681a5439ff2230fc57f5056412d3befa70d597"
+  integrity sha512-cKFwohpJbuMovS8xVLmn8N2AUbAuc8pVo4zEfsUVo8qgECOogns1WVk/FkOZoxhOPTyTYFckuoH+13FO+MQ8GA==
 
 class-utils@^0.3.5:
   version "0.3.6"