Removed external dependency as it wasn't building on Linux

Package.resolved

@@ -27,15 +27,6 @@
         "version" : "1.0.1"
       }
     },
-    {
-      "identity" : "semver.swift",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/glwithu06/Semver.swift.git",
-      "state" : {
-        "revision" : "53073d00185c49d5bdedc13e3697f5eb760fc2ad",
-        "version" : "1.2.0"
-      }
-    },
     {
       "identity" : "shellout",
       "kind" : "remoteSourceControl",

Package.swift

@@ -13,8 +13,7 @@ let package = Package(
         .package(url: "https://github.com/apple/swift-argument-parser", from: "1.1.2"),
         .package(url: "https://github.com/SwiftGen/StencilSwiftKit", from: "2.8.0"),
         .package(url: "https://github.com/JohnSundell/ShellOut", from: "2.3.0"),
-        .package(url: "https://github.com/jpsim/Yams.git", from: "5.0.6"),
-        .package(url: "https://github.com/glwithu06/Semver.swift.git", from: "1.2.0")
+        .package(url: "https://github.com/jpsim/Yams.git", from: "5.0.6")
     ],
     targets: [
         .executableTarget(
@@ -23,8 +22,7 @@ let package = Package(
                 .product(name: "ArgumentParser", package: "swift-argument-parser"),
                 .product(name: "ShellOut", package: "ShellOut"),
                 .product(name: "StencilSwiftKit", package: "StencilSwiftKit"),
-                .product(name: "Yams", package: "Yams"),
-                .product(name: "Semver", package: "Semver.swift")
+                .product(name: "Yams", package: "Yams")
             ],
             path: "Sources"),
         .testTarget(

Sources/Core/Spec+Context.swift

@@ -1,7 +1,6 @@
 //  Spec+Context.swift
 
 import Foundation
-import Semver
 
 extension Spec.Product {
     func makeContext() -> [String: Any] {
@@ -36,8 +35,8 @@ extension Spec.RemoteDependency {
 extension Spec {
     var swiftToolsVersionMajor: Int? {
         guard let swiftToolsVersionString = swiftToolsVersion else { return nil }
-        if let swiftToolsVersion = try? Semver(string: swiftToolsVersionString) {
-            return Int(swiftToolsVersion.major)
+        if let majorString = swiftToolsVersionString.components(separatedBy: ".").first {
+            return Int(majorString)
         }
         return nil
     }