fix(deps): allow MPL-2.0 license for dirs dependency

The dirs crate depends on option-ext which uses MPL-2.0.
MPL-2.0 is OSI approved and compatible with MIT/Apache-2.0.

Author: greysquirr3l

deny.toml

@@ -21,6 +21,7 @@ allow = [
     "BSD-2-Clause",
     "BSD-3-Clause",
     "ISC",
+    "MPL-2.0",
     "Unicode-DFS-2016",
     "Unicode-3.0",
     "Zlib",