feat: Adding '--platform' flag to 'snyk container' commands

We're adding 'arm' architecture support to the cli scanning. Firstly the 'platform' flag is supported if docker available locally and experimental features configured.

package.json

@@ -77,7 +77,7 @@
     "semver": "^6.0.0",
     "snyk-config": "3.1.0",
     "snyk-cpp-plugin": "1.4.1",
-    "snyk-docker-plugin": "3.18.1",
+    "snyk-docker-plugin": "3.19.0",
     "snyk-go-plugin": "1.16.0",
     "snyk-gradle-plugin": "3.6.2",
     "snyk-module": "3.1.0",