bump solidity-docgen from 0.3.7 to 0.3.9

package-lock.json

@@ -9760,9 +9760,9 @@
       }
     },
     "solidity-docgen": {
-      "version": "0.3.7",
-      "resolved": "https://registry.npmjs.org/solidity-docgen/-/solidity-docgen-0.3.7.tgz",
-      "integrity": "sha512-7YRzv4ClBbXjYZl7Bk6ZcoVYzPSmUy1o/i2FrbAdJHyVvdocJ6miALatUdIYKhTgMmzQawGLyzMnr0cS21KImA==",
+      "version": "0.3.9",
+      "resolved": "https://registry.npmjs.org/solidity-docgen/-/solidity-docgen-0.3.9.tgz",
+      "integrity": "sha512-z007kS8cZm+DiD9YDWHFmRv9rTJdFreBx/60KQncVZRQe9t2FJDMEs9yLL0pqxuA9occg7ptBCMQYxQKYSQgqQ==",
       "dev": true,
       "requires": {
         "@oclif/command": "^1.5.19",

package.json

@@ -65,7 +65,7 @@
     "nodemon": "^1.19.4",
     "solhint": "2.3.0",
     "solidity-coverage": "github:rotcivegaf/solidity-coverage#5875f5b7bc74d447f3312c9c0e9fc7814b482477",
-    "solidity-docgen": "^0.3.7",
+    "solidity-docgen": "^0.3.9",
     "truffle": "^5.0.42"
   }
 }