Fix some pixelfed hashtags not being decodable

Pachyderm/Sources/Pachyderm/Model/Hashtag.swift

@@ -7,6 +7,8 @@
 //
 
 import Foundation
+import WebURL
+import WebURLFoundationExtras
 
 public class Hashtag: Codable {
     public let name: String
@@ -20,6 +22,18 @@ public class Hashtag: Codable {
         self.history = nil
     }
     
+    public required init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        self.name = try container.decode(String.self, forKey: .name)
+        // pixelfed (possibly others) don't fully escape special characters in the hashtag url
+        if let url = URL(try container.decode(WebURL.self, forKey: .url)) {
+            self.url = url
+        } else {
+            throw DecodingError.dataCorruptedError(forKey: .url, in: container, debugDescription: "unable to convert WebURL to URL")
+        }
+        self.history = try container.decodeIfPresent([History].self, forKey: .history)
+    }
+    
     private enum CodingKeys: String, CodingKey {
         case name
         case url