Release 5.1 (#95)

* Update README.md

* Update podspec.

Author: kareman

README.md

@@ -439,7 +439,7 @@ Then run your Swift scripts with `marathon run <name>.swift`. Or add `#!/usr/bin
 
 ### [Swift Package Manager](https://github.com/apple/swift-package-manager)
 
-Add `.package(url: "https://github.com/kareman/SwiftShell", from: "5.0.1")` to your Package.swift:
+Add `.package(url: "https://github.com/kareman/SwiftShell", from: "5.1.0")` to your Package.swift:
 
 ```swift
 // swift-tools-version:5.0
@@ -452,7 +452,7 @@ let package = Package(
     platforms: [.macOS(.v10_13)],
     dependencies: [
         // Dependencies declare other packages that this package depends on.
-        .package(url: "https://github.com/kareman/SwiftShell", from: "5.0.1")
+        .package(url: "https://github.com/kareman/SwiftShell", from: "5.1.0")
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
@@ -469,7 +469,7 @@ and run `swift build`.
 
 ### [Carthage](https://github.com/Carthage/Carthage)
 
-Add `github "kareman/SwiftShell" >= 5.0` to your Cartfile, then run `carthage update` and add the resulting framework to the "Embedded Binaries" section of the application. See [Carthage's README][carthage-installation] for further instructions.
+Add `github "kareman/SwiftShell" >= 5.1` to your Cartfile, then run `carthage update` and add the resulting framework to the "Embedded Binaries" section of the application. See [Carthage's README][carthage-installation] for further instructions.
 
 [carthage-installation]: https://github.com/Carthage/Carthage#adding-frameworks-to-an-application
 
@@ -478,7 +478,7 @@ Add `github "kareman/SwiftShell" >= 5.0` to your Cartfile, then run `carthage up
 Add `SwiftShell` to your `Podfile`.
 
 ```Ruby
-pod 'SwiftShell', '>= 5.0.0'
+pod 'SwiftShell', '>= 5.1.0'
 ```
 
 Then run `pod install` to install it.

SwiftShell.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'SwiftShell'
-  s.version      = '5.0.1'
+  s.version      = '5.1.0'
   s.summary      = 'A Swift framework for shell scripting.'
   s.description  = 'SwiftShell is a library for creating command-line applications and running shell commands in Swift.'
   s.homepage     = 'https://github.com/kareman/SwiftShell'