Merge pull request #1503 from snyk/fix/dockerfile-instructions

fix: annotate deps with Dockerfile instruction that introduced them

Author: ivanstanev

package.json

@@ -77,7 +77,7 @@
     "semver": "^6.0.0",
     "snyk-config": "3.1.1",
     "snyk-cpp-plugin": "2.0.0",
-    "snyk-docker-plugin": "4.6.2",
+    "snyk-docker-plugin": "4.6.3",
     "snyk-go-plugin": "1.16.2",
     "snyk-gradle-plugin": "3.10.1",
     "snyk-module": "3.1.0",