Upgrade dependencies

.yarnrc.yml

@@ -1 +1 @@
-yarnPath: ".yarn/releases/yarn-berry.js"
+yarnPath: .yarn/releases/yarn-2.2.0.cjs

build.js

@@ -8,7 +8,6 @@ const { RawSource } = require(`webpack-sources`);
 
 const IS_PROD = process.argv[2] === `-p`;
 const EXTERNALS = [
-  `@yarnpkg/cli`,
   `@yarnpkg/core`,
   `@yarnpkg/fslib`,
   `@yarnpkg/plugin-pnp`,

package.json

@@ -8,15 +8,14 @@
     "@babel/plugin-proposal-decorators": "^7.10.5",
     "@babel/preset-typescript": "^7.10.4",
     "@types/node": "12",
-    "@yarnpkg/cli": "^2.1.1",
-    "@yarnpkg/core": "^2.1.1",
-    "@yarnpkg/fslib": "^2.1.0",
-    "@yarnpkg/plugin-pnp": "^2.1.0",
+    "@yarnpkg/core": "^2.2.0",
+    "@yarnpkg/fslib": "^2.2.0",
+    "@yarnpkg/plugin-pnp": "^2.2.0",
     "babel-loader": "^8.1.0",
     "clipanion": "^2.4.4",
-    "prettier": "^2.0.5",
+    "prettier": "2.0.5",
     "raw-loader": "^4.0.1",
-    "typescript": "^4.0.2",
+    "typescript": "4.0.2",
     "webpack": "next",
     "webpack-sources": "^1.4.3"
   },