npm: bump @types/node from 15.0.3 to 15.6.0

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 15.0.3 to 15.6.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

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

yarn.lock

@@ -1816,15 +1816,10 @@
   resolved "https://registry.yarnpkg.com/@types/minimist/-/minimist-1.2.1.tgz#283f669ff76d7b8260df8ab7a4262cc83d988256"
   integrity sha512-fZQQafSREFyuZcdWFAExYjBiCL7AUCdgsk80iO0q4yihYYdcIiH28CcuPTGFgLOCC8RlW49GSQxdHwZP+I7CNg==
 
-"@types/node@*":
-  version "14.14.37"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.37.tgz#a3dd8da4eb84a996c36e331df98d82abd76b516e"
-  integrity sha512-XYmBiy+ohOR4Lh5jE379fV2IU+6Jn4g5qASinhitfyO71b/sCo6MKsMLF5tc7Zf2CE8hViVQyYSobJNke8OvUw==
-
-"@types/node@^15.0.3":
-  version "15.0.3"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-15.0.3.tgz#ee09fcaac513576474c327da5818d421b98db88a"
-  integrity sha512-/WbxFeBU+0F79z9RdEOXH4CsDga+ibi5M8uEYr91u3CkT/pdWcV8MCook+4wDPnZBexRdwWS+PiVZ2xJviAzcQ==
+"@types/node@*", "@types/node@^15.0.3":
+  version "15.6.0"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-15.6.0.tgz#f0ddca5a61e52627c9dcb771a6039d44694597bc"
+  integrity sha512-gCYSfQpy+LYhOFTKAeE8BkyGqaxmlFxe+n4DKM6DR0wzw/HISUE/hAmkC/KT8Sw5PCJblqg062b3z9gucv3k0A==
 
 "@types/normalize-package-data@^2.4.0":
   version "2.4.0"