Add Hashable conformance to model types

Resolves #46

Author: dempseyatgithub

Sources/EvolutionMetadataModel/EvolutionMetadata.swift

@@ -7,7 +7,7 @@
 // See https://swift.org/LICENSE.txt for license information
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-public struct EvolutionMetadata: Equatable, Sendable, Codable {
+public struct EvolutionMetadata: Sendable, Hashable, Codable {
 
     /// Schema version of this struct and its related types
     public static let schemaVersion = "1.0.0"

Sources/EvolutionMetadataModel/Proposal+Discussion.swift

@@ -10,7 +10,7 @@
 extension Proposal {
 
     /// Type that represents a discussion abou a proposal.
-    public struct Discussion: Sendable, Codable, Equatable {
+    public struct Discussion: Sendable, Hashable, Codable {
 
         /// Name of the discussion
         public let name: String

Sources/EvolutionMetadataModel/Proposal+Implementation.swift

@@ -10,7 +10,7 @@
 extension Proposal {
 
     /// Type representing a repository code change of a proposal implementation
-    public struct Implementation: Sendable, Equatable, Codable {
+    public struct Implementation: Sendable, Hashable, Codable {
 
         /// The GitHub account containing the implementation
         public let account: String

Sources/EvolutionMetadataModel/Proposal+Issue.swift

@@ -13,7 +13,7 @@ extension Proposal {
     ///
     /// The `warnings` and `errors` properties contain instances of `Issue`
     ///
-    public struct Issue: Sendable, Equatable, Codable {
+    public struct Issue: Sendable, Hashable, Codable {
 
         /// Kind of issue, warning or error
         public let kind: Kind

Sources/EvolutionMetadataModel/Proposal+Person.swift

@@ -13,7 +13,7 @@ extension Proposal {
     ///
     /// The `authors` and `reviewManagers` properties contain instances of `Person`
     ///
-    public struct Person: Sendable, Codable, Equatable {
+    public struct Person: Sendable, Hashable, Codable {
 
         /// Name of the person
         public let name: String

Sources/EvolutionMetadataModel/Proposal+Status.swift

@@ -18,7 +18,7 @@ extension Proposal {
     ///
     /// The `error` case has an associated `reason` version with a diagnostic string.
     /// 
-    public enum Status: Equatable, Sendable, Comparable {
+    public enum Status: Sendable, Hashable, Comparable {
         case awaitingReview
         case scheduledForReview(start: String, end: String)
         case activeReview(start: String, end: String)

Sources/EvolutionMetadataModel/Proposal+TrackingBug.swift

@@ -10,7 +10,7 @@
 extension Proposal {
 
     /// Type that represents a tracking bug associated with a proposal.
-    public struct TrackingBug: Sendable, Equatable, Codable {
+    public struct TrackingBug: Sendable, Hashable, Codable {
 
         /// Issue ID
         public let id: String

Sources/EvolutionMetadataModel/Proposal+UpcomingFeatureFlag.swift

@@ -10,7 +10,7 @@
 extension Proposal {
 
     /// Type representing the upcoming feature flag associated with a proposal.
-    public struct UpcomingFeatureFlag: Sendable, Equatable, Codable {
+    public struct UpcomingFeatureFlag: Sendable, Hashable, Codable {
 
         /// The upcoming feature flag
         public let flag: String

Sources/EvolutionMetadataModel/Proposal.swift

@@ -66,7 +66,7 @@ Attributes are `var` variables and not `let` constants to make it easier to buil
 
 */
 
-public struct Proposal: Equatable, Sendable, Codable, Identifiable {
+public struct Proposal: Sendable, Hashable, Codable, Identifiable {
 
     /// Proposal ID in the format _SE-NNNN_. For example: "SE-0147"
     public var id: String