Prepare documentation for 1.0 release (#6)

Resolves rdar://90124447.

README.md

@@ -9,9 +9,6 @@ Please see
 [the plugin's documentation](https://apple.github.io/swift-docc-plugin/documentation/swiftdoccplugin/)
 for more detailed usage instructions.
 
-**Note:** The Swift-DocC plugin is under **active-development** and is not ready for production
-use. 
-
 We anticipate releasing a `1.0` version of the Swift-DocC plugin aligned with
 the release of Swift `5.6`.
 
@@ -24,16 +21,15 @@ let package = Package(
     // name, platforms, products, etc.
     dependencies: [
         // other dependencies
-        .package(url: "https://github.com/apple/swift-docc-plugin", branch: "main"),
+        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
     ],
     targets: [
         // targets
     ]
 )
 ```
 
-Swift 5.6 is required in order to run the plugin. Development snapshots that include Swift 5.6
-can be found on [Swift.org](https://www.swift.org/download/#snapshots).
+Swift 5.6 is required in order to run the plugin.
 
 ### Converting Documentation
 

Sources/SwiftDocCPluginDocumentation/SwiftDocCPlugin.docc/Getting Started with the Swift-DocC Plugin.md

@@ -11,7 +11,7 @@ let package = Package(
     // name, platforms, products, etc.
     dependencies: [
         // other dependencies
-        .package(url: "https://github.com/apple/swift-docc-plugin", branch: "main"),
+        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
     ],
     targets: [
         // targets
@@ -20,8 +20,6 @@ let package = Package(
 ```
 
 > Important: Swift 5.6 is required in order to run the plugin. 
->            Development snapshots that include Swift 5.6
->            can be found on [Swift.org](https://www.swift.org/download/#snapshots).
 
 You can then invoke the plugin from the root of your repository like so:
 

Sources/SwiftDocCPluginDocumentation/SwiftDocCPlugin.docc/SwiftDocCPlugin.md

@@ -7,12 +7,6 @@ Produce Swift-DocC documentation for Swift Package libraries and executables.
 The Swift-DocC plugin is a Swift Package Manager command plugin that supports building
 documentation for SwiftPM libraries and executables.
 
-> Important: The Swift-DocC plugin is under **active-development** and is not ready for production
-> use. 
-> 
-> We anticipate releasing a `1.0` version of the Swift-DocC plugin aligned with
-> the release of Swift `5.6`.
-
 After adding the plugin as a dependency in your Swift package manifest, you can build
 documentation for the libraries and executables in that package and its dependencies by running the
 following from the command-line: