Swift version bumped up to 5.6

Since this is the first version to officially make Swift Package Plugins available. Also, fix for type inference error

Package.resolved

@@ -1,52 +1,50 @@
 {
-  "object": {
-    "pins": [
-      {
-        "package": "SourceKitten",
-        "repositoryURL": "https://github.com/jpsim/SourceKitten.git",
-        "state": {
-          "branch": null,
-          "revision": "817dfa6f2e09b0476f3a6c9dbc035991f02f0241",
-          "version": "0.32.0"
-        }
-      },
-      {
-        "package": "swift-argument-parser",
-        "repositoryURL": "https://github.com/apple/swift-argument-parser.git",
-        "state": {
-          "branch": null,
-          "revision": "df9ee6676cd5b3bf5b330ec7568a5644f547201b",
-          "version": "1.1.3"
-        }
-      },
-      {
-        "package": "SWXMLHash",
-        "repositoryURL": "https://github.com/drmohundro/SWXMLHash.git",
-        "state": {
-          "branch": null,
-          "revision": "6469881a3f30417c5bb02404ea4b69207f297592",
-          "version": "6.0.0"
-        }
-      },
-      {
-        "package": "XcodeIssueReporting",
-        "repositoryURL": "https://github.com/baguio/XcodeIssueReporting",
-        "state": {
-          "branch": null,
-          "revision": "81e902f09fb9081240bb446a4d4549cce76b9362",
-          "version": "1.3.0"
-        }
-      },
-      {
-        "package": "Yams",
-        "repositoryURL": "https://github.com/jpsim/Yams.git",
-        "state": {
-          "branch": null,
-          "revision": "9ff1cc9327586db4e0c8f46f064b6a82ec1566fa",
-          "version": "4.0.6"
-        }
+  "pins" : [
+    {
+      "identity" : "sourcekitten",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/jpsim/SourceKitten.git",
+      "state" : {
+        "revision" : "817dfa6f2e09b0476f3a6c9dbc035991f02f0241",
+        "version" : "0.32.0"
       }
-    ]
-  },
-  "version": 1
+    },
+    {
+      "identity" : "swift-argument-parser",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-argument-parser.git",
+      "state" : {
+        "revision" : "df9ee6676cd5b3bf5b330ec7568a5644f547201b",
+        "version" : "1.1.3"
+      }
+    },
+    {
+      "identity" : "swxmlhash",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/drmohundro/SWXMLHash.git",
+      "state" : {
+        "revision" : "6469881a3f30417c5bb02404ea4b69207f297592",
+        "version" : "6.0.0"
+      }
+    },
+    {
+      "identity" : "xcodeissuereporting",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/baguio/XcodeIssueReporting",
+      "state" : {
+        "revision" : "6df15f8267a92ae33b6d79f850ae9d53dd864f56",
+        "version" : "1.4.0"
+      }
+    },
+    {
+      "identity" : "yams",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/jpsim/Yams.git",
+      "state" : {
+        "revision" : "9ff1cc9327586db4e0c8f46f064b6a82ec1566fa",
+        "version" : "4.0.6"
+      }
+    }
+  ],
+  "version" : 2
 }

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version: 5.5
+// swift-tools-version: 5.6
 
 import PackageDescription
 

Sources/SafeURLLintFramework/SafeURLLintFramework.swift

@@ -72,7 +72,7 @@ public class SafeURLKit {
 
         let urlDeclarations: [SourceKittenSubstructure] = skd.flatten().compactMap { "URL" == $0.name ? $0.substructure : nil }
 
-        let allViolations: [RawLintViolation] = urlDeclarations.flatMap { urlInit in
+        let allViolations: [RawLintViolation] = urlDeclarations.flatMap { urlInit -> [RawLintViolation] in
             var declarationViolations: [RawLintViolation] = []
 
             guard