MOBILE-3654 travis: Add iOS builds

.travis.yml

@@ -1,6 +1,5 @@
 os: linux
 dist: trusty
-language: android
 node_js: 12
 
 if: env(DEPLOY) = 1
@@ -8,16 +7,6 @@ if: env(DEPLOY) = 1
 git:
   depth: 3
 
-android:
-    components:
-    - tools
-    - platform-tools
-    - build-tools-29.0.3
-    - android-28
-    - extra-google-google_play_services
-    - extra-google-m2repository
-    - extra-android-m2repository
-
 before_cache:
   - rm -rf $HOME/.cache/electron-builder/wine
   - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
@@ -46,3 +35,24 @@ before_script:
 
 script:
   - scripts/build.sh
+
+jobs:
+  include:
+  - stage: build
+    name: "Build Android"
+    language: android
+    android:
+      components:
+      - tools
+      - platform-tools
+      - build-tools-29.0.3
+      - android-28
+      - extra-google-google_play_services
+      - extra-google-m2repository
+      - extra-android-m2repository
+  - stage: build
+    name: "Build iOS"
+    language: node_js
+    if: env(DEPLOY) = 1 AND env(BUILD_IOS) = 1
+    os: osx
+    osx_image: xcode12.4