Bump terser from 5.5.1 to 5.6.0

Bumps [terser](https://github.com/terser/terser) from 5.5.1 to 5.6.0.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/commits)
Signed-off-by: dependabot[bot] <support@github.com>

yarn.lock

@@ -7413,9 +7413,9 @@ teeny-request@6.0.1:
     uuid "^3.3.2"
 
 terser@^5.0.0:
-  version "5.5.1"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-5.5.1.tgz#540caa25139d6f496fdea056e414284886fb2289"
-  integrity sha512-6VGWZNVP2KTUcltUQJ25TtNjx/XgdDsBDKGt8nN0MpydU36LmbPPcMBd2kmtZNNGVVDLg44k7GKeHHj+4zPIBQ==
+  version "5.6.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.6.0.tgz#138cdf21c5e3100b1b3ddfddf720962f88badcd2"
+  integrity sha512-vyqLMoqadC1uR0vywqOZzriDYzgEkNJFK4q9GeyOBHIbiECHiWLKcWfbQWAUaPfxkjDhapSlZB9f7fkMrvkVjA==
   dependencies:
     commander "^2.20.0"
     source-map "~0.7.2"