switch to using yarn

Use yarn which makes it consisten with the LSP

Author: gorkem

.vscode/tasks.json

@@ -9,7 +9,7 @@
       // the command is a shell script
       "type": "shell",
       // we run the custom npm script "compile" as defined in package.json
-      "command": "npm run compile --loglevel silent",
+      "command": "yarn run compile --loglevel silent",
       // show the output window only if unrecognized errors occur.
       "presentation": {
         "reveal": "silent"

CONTRIBUTING.md

@@ -46,7 +46,7 @@ All contributions are welcome!
             ├──── yaml-language-server/
   ```
 
-3. Run `npm install` in both directories to initialize `node_modules` dependencies.
+3. Run `yarn install` in both directories to initialize `node_modules` dependencies.
 
 4. In `vscode-yaml/src/extension.ts` set the `serverModule` variable to:
 
@@ -59,7 +59,7 @@ All contributions are welcome!
 5. In BOTH directories run:
 
    ```bash
-   npm run compile
+   yarn run compile
    ```
 
 6. To run the language server in VSCode, click `View -> Debug`, then from the drop down menu beside the green arrow select `Launch Extension (vscode-yaml)`, click the arrow, and a new VSCode window should load with the YAML LS running.

Jenkinsfile

@@ -3,13 +3,13 @@
 def installBuildRequirements(){
 	def nodeHome = tool 'nodejs-12.20.0'
 	env.PATH="${env.PATH}:${nodeHome}/bin"
-	sh "npm install -g typescript"
-	sh "npm install -g vsce"
+	sh "yarn install -g typescript"
+	sh "yarn install -g vsce"
 }
 
 def buildVscodeExtension(){
-	sh "npm install"
-	sh "npm run vscode:prepublish"
+	sh "yarn install"
+	sh "yarn run vscode:prepublish"
 }
 
 node('rhel8'){
@@ -22,13 +22,13 @@ node('rhel8'){
 	installBuildRequirements()
 
 	stage 'Build vscode-yaml'
-	sh "npm install"
-	sh "npm run build"
-  sh "npm run check-dependencies"
+	sh "yarn install"
+	sh "yarn run build"
+  sh "yarn run check-dependencies"
 
 	stage 'Test vscode-yaml for staging'
 	wrap([$class: 'Xvnc']) {
-		sh "npm test --silent"
+		sh "yarn test --silent"
 	}
 
 	stage "Package vscode-yaml"
@@ -56,7 +56,7 @@ node('rhel8'){
 	  }
 
 	  // Open-vsx Marketplace
-	  sh "npm install -g ovsx"
+	  sh "yarn install -g ovsx"
 	  withCredentials([[$class: 'StringBinding', credentialsId: 'open-vsx-access-token', variable: 'OVSX_TOKEN']]) {
 	  	sh 'ovsx publish -p ${OVSX_TOKEN}' + " ${vsix[0].path}"
 	  }