Add danger-swift plugin

Add checking for SDK code syntaxis with swiftlint

Dangerfile.swift

@@ -0,0 +1,12 @@
+// Dangerfile.swift
+
+import Foundation
+import Danger
+
+let danger = Danger()
+
+if danger.git.createdFiles.count + danger.git.modifiedFiles.count - danger.git.deletedFiles.count > 10 {
+    warn("Big PR, try to keep changes smaller if you can")
+}
+
+SwiftLint.lint(directory: "CrowdinSDK/", configFile: "CrowdinSDK/Classes/.swiftlint.yml")

_dangerfile_imports.swift

@@ -0,0 +1 @@
+import DangerSwiftLint // package: https://github.com/ashfurrow/DangerSwiftLint.git

azure-pipelines.yml

@@ -13,19 +13,29 @@ trigger:
       - LICENSE
 
 jobs:
+  - job: DangerSwiftLint
+    pool:
+      vmImage: 'macOS 10.14'
+    steps:
+      - bash: |
+          brew install swiftlint ; brew install danger/tap/danger-swift ; export DANGER_GITHUB_API_TOKEN='$(DANGER_GITHUB_API_TOKEN)' ; danger-swift ci 
+        displayName: 'Danger SwiftLint'
+
   - job: PodInstall
+    dependsOn: DangerSwiftLint
+    condition: succeeded()
     pool:
-      vmImage: 'macOS 10.13'
+      vmImage: 'macOS 10.14'
     steps:
       - bash: |
-          cd Tests ; pod update Starscream; pod install
+          cd Tests ; pod update Starscream; pod update BaseAPI; pod install
         displayName: 'Installing cocoapods'
 
   - job: Build
     dependsOn: PodInstall
     condition: succeeded()
     pool:
-      vmImage: 'macOS 10.13'
+      vmImage: 'macOS 10.14'
     steps:
       - task: Xcode@5
         displayName: 'Build Xcode App'
@@ -42,7 +52,7 @@ jobs:
     dependsOn: Build
     condition: succeeded()
     pool:
-      vmImage: 'macOS 10.13'
+      vmImage: 'macOS 10.14'
     steps:
       - task: Xcode@5
         displayName: 'Running tests'