feat(elixir): emit dependency relationships from mix.lock (#4985)

adds dependency-of relationships between elixir locked packages, matching how other
ecosystem catalogers (alpine, arch, debian, redhat, python) express the
dependency graph via the shared dependency.Processor/Specifier mechanism.

Signed-off-by: Chris Greeno <cgreeno@gmail.com>

schema/json/schema-latest.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://json-schema.org/draft/2020-12/schema",
-  "$id": "anchore.io/schema/syft/json/16.1.5/document",
+  "$id": "anchore.io/schema/syft/json/16.1.6/document",
   "$ref": "#/$defs/Document",
   "$defs": {
     "AlpmDbEntry": {
@@ -1267,6 +1267,13 @@
         "pkgHashExt": {
           "type": "string",
           "description": "PkgHashExt is the extended package hash format (inner checksum is deprecated - SHA-256 of concatenated file contents excluding CHECKSUM file, now replaced by outer checksum)"
+        },
+        "dependencies": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array",
+          "description": "Dependencies are the names of the packages this entry depends on, as\ndeclared in the entry's dependency list within mix.lock. Used to derive\ndependency-of relationships between locked packages."
         }
       },
       "type": "object",