chore(deps): update dependency @sourcegraph/eslint-config to ^0.20.0

Author: renovate-bot

package.json

@@ -118,7 +118,7 @@
   "devDependencies": {
     "@commitlint/cli": "^9.1.1",
     "@commitlint/config-conventional": "^9.1.1",
-    "@sourcegraph/eslint-config": "^0.19.15",
+    "@sourcegraph/eslint-config": "^0.20.0",
     "@sourcegraph/prettierrc": "^3.0.3",
     "@sourcegraph/tsconfig": "^3.0.0",
     "@types/mocha": "7.0.2",

yarn.lock

@@ -950,10 +950,10 @@
   resolved "https://registry.yarnpkg.com/@sinonjs/text-encoding/-/text-encoding-0.7.1.tgz#8da5c6530915653f3a1f38fd5f101d8c3f8079c5"
   integrity sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==
 
-"@sourcegraph/eslint-config@^0.19.15":
-  version "0.19.15"
-  resolved "https://registry.yarnpkg.com/@sourcegraph/eslint-config/-/eslint-config-0.19.15.tgz#99f826c8d9230aecddb28e1653a4ad8e652b6f9f"
-  integrity sha512-x76bN05kbFVDYInfrRFbup39Gprvp5kYp1GRbXjL4U/Ig6F0T6r93Mf0wLinl+asjp+04AVAlZ9umlA+DQzNFA==
+"@sourcegraph/eslint-config@^0.20.0":
+  version "0.20.0"
+  resolved "https://registry.yarnpkg.com/@sourcegraph/eslint-config/-/eslint-config-0.20.0.tgz#4a068d90fb4a4c42641aa171319a8680cad3ab92"
+  integrity sha512-DF0NE/wqBcsFbY5FSd98M/SRTf5PV3GcjE6Kt3ReXCjorbanxAW41mazeydfXUrYFyHPSyuiiwE+bt9cQ7EP7w==
   dependencies:
     "@sourcegraph/prettierrc" "^3.0.3"
     "@typescript-eslint/eslint-plugin" "^3.6.0"