Modified deny.toml to get a successful build in the absence of Cargo.…

…lock

- Allowed BSD-2-Clause to fix a license issue.
- Allowed multiple versions of rust crates to co-exist because without Cargo.lock there is no control over the dependency tree.

deny.toml

@@ -7,7 +7,7 @@ confidence-threshold = 0.93
 # Commented license types are allowed but not currently used
 allow = [
     "Apache-2.0",
-    # "BSD-2-Clause",
+    "BSD-2-Clause",
     "BSD-3-Clause",
     "BSL-1.0",
     # "CC0-1.0",
@@ -44,7 +44,6 @@ exceptions = [
 
 [bans]
 # Deny multiple versions or wildcard dependencies.
-multiple-versions = "deny"
 wildcards = "deny"
 
 skip = [