Merge pull request #1396 from snyk/feat/error-handling-for-docker-platform

feat: Error handling for `--platform` flag

Author: agatakrajewska

package.json

@@ -77,7 +77,7 @@
     "semver": "^6.0.0",
     "snyk-config": "3.1.0",
     "snyk-cpp-plugin": "1.4.3",
-    "snyk-docker-plugin": "3.19.0",
+    "snyk-docker-plugin": "3.20.0",
     "snyk-go-plugin": "1.16.0",
     "snyk-gradle-plugin": "3.6.2",
     "snyk-module": "3.1.0",