Update version number in docs

Summary:
Part of Instagram#707
Closes Instagram#734

Differential Revision: D5046692

Pulled By: jessesquires

fbshipit-source-id: db43f99fd0bbf4186a1bd47070f28a9a446bc2a4

Guides/Installation.md

@@ -9,7 +9,7 @@ The preferred method of installation for `IGListKit` is using [CocoaPods](https:
 In order to use the latest release of the framework, add the following to your `Podfile`:
 
 ```ruby
-pod 'IGListKit', '~> 2.0.0'
+pod 'IGListKit', '~> 3.0.0'
 ```
 
 ### Using `master`
@@ -29,7 +29,7 @@ With the exception of `macOS` (which currently only supports the diffing algorit
 However, if you only want to use the diffing components of this library, then you can use the diffing subspec in your `Podfile`:
 
 ```ruby
-pod 'IGListKit/Diffing', '~> 2.0.0'
+pod 'IGListKit/Diffing', '~> 3.0.0'
 ```
 
 Regardless of whether you only use the diffing components, or the entire library, the imports are the same:
@@ -43,5 +43,5 @@ import IGListKit
 If using [Carthage](https://github.com/Carthage/Carthage), add the following to your `Cartfile`:
 
 ```ogdl
-github "Instagram/IGListKit" ~> 2.0.0
+github "Instagram/IGListKit" ~> 3.0.0
 ```

README.md

@@ -59,15 +59,15 @@ We use the open source version `master` branch in the Instagram app.
 The preferred installation method is with [CocoaPods](https://cocoapods.org). Add the following to your `Podfile`:
 
 ```ruby
-pod 'IGListKit', '~> 2.0.0'
+pod 'IGListKit', '~> 3.0.0'
 ```
 
 ### Carthage
 
 For [Carthage](https://github.com/Carthage/Carthage), add the following to your `Cartfile`:
 
 ```ogdl
-github "Instagram/IGListKit" ~> 2.0.0
+github "Instagram/IGListKit" ~> 3.0.0
 ```
 
 > For advanced usage, see our [Installation Guide](https://instagram.github.io/IGListKit/installation.html).