invoices: Remove blank lines

Sources/Stripe/API/Routes/InvoiceItemRoutes.swift

@@ -162,5 +162,4 @@ public final class InvoiceItemRoutes {
         }
         return try StripeRequest(client: self.client, method: .get, route: .invoiceItems, query: query, body: nil, headers: nil)
     }
-
 }

Sources/Stripe/Models/Invoices/Invoice.swift

@@ -95,7 +95,6 @@ public final class Invoice: StripeModelProtocol {
         if let lines = node["lines"]?.object, let data = lines["data"]?.array {
             self.lines = try data.map({ try InvoiceLineItem(node: $0) })
         }
-
     }
 
     public func makeNode(in context: Context?) throws -> Node {
@@ -158,5 +157,4 @@ public final class InvoiceList: StripeModelProtocol {
         ]
         return try Node(node: object)
     }
-
 }

Sources/Stripe/Models/Invoices/InvoiceItem.swift

@@ -74,14 +74,11 @@ public final class InvoiceItem: StripeModelProtocol {
             "proration": self.isProration,
             "quantity": self.quantity,
             "subscription": self.subscription,
-
             "period": [
                 "start": self.periodStart,
                 "end": self.periodEnd
             ],
-
             "metadata": self.metadata,
-
             "plan": self.plan,
             "currency": self.currency?.rawValue
         ]

Sources/Stripe/Models/Invoices/InvoiceLineGroup.swift

@@ -29,5 +29,4 @@ public final class InvoiceLineGroup: StripeModelProtocol {
         ]
         return try Node(node: object)
     }
-
 }

Sources/Stripe/Models/Invoices/InvoiceLineItem.swift

@@ -79,5 +79,4 @@ public final class InvoiceLineItem: StripeModelProtocol {
 
         return try Node(node: object)
     }
-
 }

Tests/StripeTests/InvoiceItemTests.swift

@@ -240,5 +240,4 @@ class InvoiceItemTests: XCTestCase {
             XCTFail(error.localizedDescription)
         }
     }
-
 }

Tests/StripeTests/InvoiceTests.swift

@@ -309,5 +309,4 @@ class InvoiceTests: XCTestCase {
             XCTFail(error.localizedDescription)
         }
     }
-
 }