diff --git a/.vscode/launch.json b/.vscode/launch.json
index 9237392..ac924c0 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -2,20 +2,20 @@
   // Use IntelliSense to learn about possible attributes.
   // Hover to view descriptions of existing attributes.
   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-  "version": "0.2.0",
-  "configurations": [
+  version: "0.2.0",
+  configurations: [
     {
-      "type": "node",
-      "request": "launch",
-      "name": "Mocha Tests",
-      "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
-      "args": ["--no-timeouts", "--colors", "--require", "ts-node/register"],
-      "skipFiles": ["async_hooks.js", "inspector_async_hook.js"],
-      "env": {
-        "TS_NODE_COMPILER_OPTIONS": "{\"module\":\"commonjs\"}"
+      type: "node",
+      request: "launch",
+      name: "Mocha Tests",
+      program: "${workspaceFolder}/node_modules/mocha/bin/_mocha",
+      args: ["--no-timeouts", "--colors", "--require", "ts-node/register"],
+      skipFiles: ["async_hooks.js", "inspector_async_hook.js"],
+      env: {
+        TS_NODE_COMPILER_OPTIONS: '{"module":"commonjs"}',
       },
-      "console": "integratedTerminal",
-      "smartStep": false
-    }
-  ]
+      console: "integratedTerminal",
+      smartStep: false,
+    },
+  ],
 }
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 25fa621..3fe865a 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,3 +1,3 @@
 {
-  "typescript.tsdk": "node_modules/typescript/lib"
+  "typescript.tsdk": "node_modules/typescript/lib",
 }
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 0000000..6df1f26
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,13 @@
+{
+  // See https://go.microsoft.com/fwlink/?LinkId=733558
+  // for the documentation about the tasks.json format
+  version: "2.0.0",
+  tasks: [
+    {
+      type: "npm",
+      script: "watch",
+      problemMatcher: ["$tsc-watch"],
+      isBackground: true,
+    },
+  ],
+}
diff --git a/package.json b/package.json
index 18f38ca..e0ba201 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
     "@commitlint/cli": "^7.2.1",
     "@commitlint/config-conventional": "^7.1.2",
     "@sourcegraph/extension-api-stubs": "^0.2.0",
-    "@sourcegraph/prettierrc": "^2.2.0",
+    "@sourcegraph/prettierrc": "^3.0.0",
     "@sourcegraph/tsconfig": "^4.0.0",
     "@sourcegraph/tslint-config": "^13.0.0",
     "@types/lodash": "4.14.124",
diff --git a/tsconfig.json b/tsconfig.json
index 8baad41..911afbf 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,17 +1,17 @@
 {
-  "extends": "@sourcegraph/tsconfig",
-  "compilerOptions": {
-    "target": "es2018",
-    "moduleResolution": "node",
-    "typeRoots": ["src/types", "node_modules/@types"],
-    "module": "esnext",
-    "lib": ["esnext", "webworker"],
-    "sourceMap": true,
-    "declaration": true,
-    "declarationMap": true,
-    "outDir": "dist",
-    "rootDir": "src",
-    "esModuleInterop": true,
-    "allowSyntheticDefaultImports": true
-  }
+  extends: "@sourcegraph/tsconfig",
+  compilerOptions: {
+    target: "es2018",
+    moduleResolution: "node",
+    typeRoots: ["src/types", "node_modules/@types"],
+    module: "esnext",
+    lib: ["esnext", "webworker"],
+    sourceMap: true,
+    declaration: true,
+    declarationMap: true,
+    outDir: "dist",
+    rootDir: "src",
+    esModuleInterop: true,
+    allowSyntheticDefaultImports: true,
+  },
 }
diff --git a/yarn.lock b/yarn.lock
index 007e4db..e8a03da 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -427,10 +427,10 @@
   resolved "https://registry.npmjs.org/@sourcegraph/extension-api-types/-/extension-api-types-2.0.0.tgz#b38145521c0549b2be300df53bac48b648ccbc2d"
   integrity sha512-Te7F1RQJLBH4C8wQ2xz0nPC2vpe13F80V+Yv+c3GySOoh4DcLNN4P5u51Kh4aZPqeS5DJ7CKvHyX2SM/1EBXNg==
 
-"@sourcegraph/prettierrc@^2.2.0":
-  version "2.2.0"
-  resolved "https://registry.npmjs.org/@sourcegraph/prettierrc/-/prettierrc-2.2.0.tgz#af4a6fcd465b0a39a07ffbd8f2d3414d01e603e8"
-  integrity sha512-kRdHxdAppxYnN7qAQjNTyuG05pjYHFtEUquZauXVXBeaGB4sye3uSkb8wgi34jeaUHG/gWp2f5hQgCCBMizjjA==
+"@sourcegraph/prettierrc@^3.0.0":
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/@sourcegraph/prettierrc/-/prettierrc-3.0.0.tgz#716b64b287565f98f539f76bea206912ab4d03b3"
+  integrity sha512-ziLujsC3IESHGYdtiJ7yVjte9i7mr6jKWTYtCVqgOWeY1Er0/xsQ/sdZIyK61tD282wvd7VjS4pk5RoGEN7biw==
 
 "@sourcegraph/tsconfig@^4.0.0":
   version "4.0.0"