set npm version as part of the npm-dependencies CI task (#5427)

* set npm version as part of the npm-dependencies CI task

* Set branch name to only build ios-simulator

.circleci/config.yml

@@ -92,6 +92,8 @@ commands:
   npm-dependencies:
     description: "Get JavaScript dependencies"
     steps:
+      - node/install-npm:
+          version: '6.14.11'
       - restore_cache:
           name: Restore npm cache
           key: v2-npm-{{ checksum "package.json" }}-{{ arch }}
@@ -159,8 +161,6 @@ commands:
     steps:
       - checkout:
           path: ~/mattermost-mobile
-      - node/install-npm:
-          version: '6.14.11'
       - npm-dependencies
       - pods-dependencies
       - assets
@@ -590,6 +590,7 @@ workflows:
                 - /^build-\d+$/
                 - /^build-ios-\d+$/
                 - /^build-ios-beta-\d+$/
+                - /^build-ios-sim-\d+$/
                 
       - github-release:
           context: mattermost-mobile-unsigned