build(deps-dev): bump ts-loader from 6.1.2 to 6.2.1

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 6.1.2 to 6.2.1.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/ts-loader@v6.1.2...v6.2.1)

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

Author: dependabot-preview[bot]

package.json

@@ -29,7 +29,7 @@
     "imports-loader": "^0.8.0",
     "jest": "^24.9.0",
     "ts-jest": "^24.1.0",
-    "ts-loader": "^6.1.2",
+    "ts-loader": "^6.2.1",
     "tslint": "^5.20.0",
     "typescript": "^3.7.2"
   },

yarn.lock

@@ -4292,10 +4292,10 @@ ts-jest@^24.1.0:
     semver "^5.5"
     yargs-parser "10.x"
 
-ts-loader@^6.1.2:
-  version "6.1.2"
-  resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-6.1.2.tgz#ff6bc767334970226438949fbde2e211147a1325"
-  integrity sha512-dudxFKm0Ellrg/gLNlu+97/UgwvoMK0SdUVImPUSzq3IcRUVtShylZvcMX+CgvCQL1BEKb913NL0gAP1GA/OFw==
+ts-loader@^6.2.1:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-6.2.1.tgz#67939d5772e8a8c6bdaf6277ca023a4812da02ef"
+  integrity sha512-Dd9FekWuABGgjE1g0TlQJ+4dFUfYGbYcs52/HQObE0ZmUNjQlmLAS7xXsSzy23AMaMwipsx5sNHvoEpT2CZq1g==
   dependencies:
     chalk "^2.3.0"
     enhanced-resolve "^4.0.0"