Update prettier (#22520)

* Update prettier to latest version

* Run 'yarn format' from root of project

* Remove prettier-ignore for nested markdown

* Fix starters

* Fix benchmarks

* Fix examples

* Fix integration-tests

* Update eslint-config-prettier & eslint-plugin-prettier

* Fix linting

* Update all .prettierrc

* Run Prettier on full codebase

* Remove unnecessary .prettierrc & .prettierignore files

* Update Prettier script

* Update snapshots

* Revert snapshot

* Revert "Update Prettier script"

This reverts commit 008eb996

* Update snapshot

* Update docs/blog/2018-08-09-swag-store/index.md

Co-Authored-By: Dima An <dmitriym44@gmail.com>

Co-authored-by: Dima An <dmitriym44@gmail.com>

package-lock.json

@@ -10663,9 +10663,9 @@
       "integrity": "sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc="
     },
     "prettier": {
-      "version": "1.19.1",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.19.1.tgz",
-      "integrity": "sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==",
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.0.4.tgz",
+      "integrity": "sha512-SVJIQ51spzFDvh4fIbCLvciiDMCrRhlN3mbZvv/+ycjvmF5E73bKdGfU8QDLNmjYJf+lsGnDBC4UUnvTe5OO0w==",
       "dev": true
     },
     "pretty-error": {