chore(yarn): Upgrade to Yarn 2

Author: FlorianWendelborn

.gitignore

@@ -1,5 +1,11 @@
 # mirror to .npmignore
 /coverage/
 /node_modules/
+.yarn/*
 # .gitignore-only
-/build/
+/build/
+!.yarn/cache
+!.yarn/releases
+!.yarn/plugins
+!.yarn/sdks
+!.yarn/versions

.npmignore

@@ -1,9 +1,10 @@
 # mirror to .gitignore
 /coverage/
 /node_modules/
+.yarn/*
 # .npmignore-only
 .codeclimate.yml
 .travis.yml
 .gitignore
 tsconfig.json
-yarn.lock
+yarn.lock

.pnp.js

@@ -1,9 +1,9 @@
 sudo: false
 language: node_js
 node_js:
-  - '8'
-  - '10'
-  - 'node'
+  - "12"
+  - "14"
+  - "node"
 before_script:
   - curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
   - chmod +x ./cc-test-reporter

.travis.yml

@@ -0,0 +1,3 @@
+{
+	"recommendations": ["arcanis.vscode-zipfs"]
+}

.vscode/extensions.json

@@ -0,0 +1,8 @@
+{
+	"search.exclude": {
+		"**/.pnp.*": true,
+		"**/.yarn": true
+	},
+	"typescript.enablePromptUseWorkspaceTsdk": true,
+	"typescript.tsdk": ".yarn/sdks/typescript/lib"
+}