chore: update delivlib pipeline to use yarn

package.json

@@ -6,17 +6,17 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "scripts": {
-    "build": "npm run build:assets && tsc && tslint --fix --project .",
-    "build:assets": "npm run build:assets:custom-resource-handlers && npm run build:assets:lambda-handlers",
+    "build": "yarn build:assets && tsc && tslint --fix --project .",
+    "build:assets": "yarn build:assets:custom-resource-handlers && yarn build:assets:lambda-handlers",
     "build:assets:custom-resource-handlers": "/bin/bash ./build-custom-resource-handlers.sh",
     "build:assets:lambda-handlers": "/bin/bash ./build-lambda-handlers.sh",
     "package": "/bin/bash ./package.sh",
     "watch": "tsc -w",
     "test": "/bin/bash ./test.sh",
     "cdk": "cdk",
     "bump": "standard-version",
-    "pipeline-update": "npm run build && cdk -a pipeline/delivlib.js deploy",
-    "pipeline-diff": "npm run build && cdk -a pipeline/delivlib.js diff"
+    "pipeline-update": "yarn build && cdk -a pipeline/delivlib.js deploy",
+    "pipeline-diff": "yarn build && cdk -a pipeline/delivlib.js diff"
   },
   "keywords": [
     "aws-cdk",

pipeline/delivlib.ts

@@ -31,12 +31,12 @@ export class DelivLibPipelineStack extends cdk.Stack {
         version: '0.2',
         phases: {
           install: {
-            commands: [ 'npm ci' ]
+            commands: [ 'yarn install --frozen-lockfile' ]
           },
           build: {
             commands: [
-              'npm run build',
-              'npm test'
+              'yarn build',
+              'yarn test'
             ]
           },
           post_build: {
@@ -61,7 +61,7 @@ export class DelivLibPipelineStack extends cdk.Stack {
     });
 
     pipeline.autoBump({
-      bumpCommand: 'npm i && npm run bump',
+      bumpCommand: 'yarn install --frozen-lockfile && yarn bump',
       branch: 'master'
     });
   }