chore(deps-dev): bump yarn from 1.17.3 to 1.21.1 (#669)

Author: dependabot-preview[bot]

package.json

@@ -48,7 +48,7 @@
     "lint-staged": "^9.0.0",
     "prettier": "1.19.1",
     "typescript": "^3.7.0",
-    "yarn": "1.17.3"
+    "yarn": "1.21.1"
   },
   "workspaces": [
     "packages/*",

yarn.lock

@@ -9934,10 +9934,10 @@ yargs@~3.5.4:
     window-size "0.1.0"
     wordwrap "0.0.2"
 
-yarn@1.17.3:
-  version "1.17.3"
-  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.17.3.tgz#60e0b77d079eb78e753bb616f7592b51b6a9adce"
-  integrity sha512-CgA8o7nRZaQvmeF/WBx2FC7f9W/0X59T2IaLYqgMo6637wfp5mMEsM3YXoJtKUspnpmDJKl/gGFhnqS+sON7hA==
+yarn@1.21.1:
+  version "1.21.1"
+  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.21.1.tgz#1d5da01a9a03492dc4a5957befc1fd12da83d89c"
+  integrity sha512-dQgmJv676X/NQczpbiDtc2hsE/pppGDJAzwlRiADMTvFzYbdxPj2WO4PcNyriSt2c4jsCMpt8UFRKHUozt21GQ==
 
 [email protected]:
   version "2.4.1"