build(deps-dev): bump prismjs from 1.6.0 to 1.21.0

Bumps [prismjs](https://github.com/PrismJS/prism) from 1.6.0 to 1.21.0.
- [Release notes](https://github.com/PrismJS/prism/releases)
- [Changelog](https://github.com/PrismJS/prism/blob/master/CHANGELOG.md)
- [Commits](PrismJS/prism@v1.6.0...v1.21.0)

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

Author: dependabot[bot]

yarn.lock

@@ -1254,10 +1254,10 @@ cli-width@^2.0.0:
   resolved "https://registry.npmjs.org/cli-width/-/cli-width-2.1.0.tgz#b234ca209b29ef66fc518d9b98d5847b00edf00a"
   integrity sha1-sjTKIJsp72b8UY2bmNWEewDt8Ao=
 
-clipboard@^1.5.5:
-  version "1.7.1"
-  resolved "https://registry.npmjs.org/clipboard/-/clipboard-1.7.1.tgz#360d6d6946e99a7a1fef395e42ba92b5e9b5a16b"
-  integrity sha1-Ng1taUbpmnof7zleQrqStem1oWs=
+clipboard@^2.0.0:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/clipboard/-/clipboard-2.0.6.tgz#52921296eec0fdf77ead1749421b21c968647376"
+  integrity sha512-g5zbiixBRk/wyKakSwCKd7vQXDjFnAMGHoEyBogG/bw9kTD9GvdAvaoRR1ALcEzt3pVKxZR0pViekPMIS0QyGg==
   dependencies:
     good-listener "^1.2.2"
     select "^1.1.2"
@@ -3975,11 +3975,11 @@ prettier@^1.2.2:
   integrity sha512-f55mvineQ5yc36cLX4n4RWP6JH6MLcfi5f9MVsjpfBs4MVSG2GYT4v6cukzmvkIOvmNOdCZfDSMY3hQcMcDQbQ==
 
 prismjs@^1.6.0:
-  version "1.6.0"
-  resolved "https://registry.npmjs.org/prismjs/-/prismjs-1.6.0.tgz#118d95fb7a66dba2272e343b345f5236659db365"
-  integrity sha1-EY2V+3pm26InLjQ7NF9SNmWds2U=
+  version "1.21.0"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.21.0.tgz#36c086ec36b45319ec4218ee164c110f9fc015a3"
+  integrity sha512-uGdSIu1nk3kej2iZsLyDoJ7e9bnPzIgY0naW/HdknGj61zScaprVEVGHrPoXqI+M9sP0NDnTK2jpkvmldpuqDw==
   optionalDependencies:
-    clipboard "^1.5.5"
+    clipboard "^2.0.0"
 
 private@^0.1.8:
   version "0.1.8"