Merge pull request swiftlang#54 from benlangmuir/update-tc

Update recommended toolchain to 2018-12-18-a

Author: benlangmuir

README.md

@@ -7,7 +7,7 @@ SourceKit-LSP is an implementation of the [Language Server Protocol](https://mic
 
 SourceKit-LSP is under heavy development! The best way to try it out is to build it from source. You will also need a Swift development toolchain and an editor that supports LSP.
 
-1. Install the `swift-DEVELOPMENT-SNAPSHOT-2018-12-07-a` toolchain snapshot from https://swift.org/download/#snapshots. Set the environment variable `SOURCEKIT_TOOLCHAIN_PATH` to the absolute path to the toolchain or otherwise configure your editor to use this toolchain. See [Toolchains](#toolchains) for more information.
+1. Install the `swift-DEVELOPMENT-SNAPSHOT-2018-12-18-a` toolchain snapshot from https://swift.org/download/#snapshots. Set the environment variable `SOURCEKIT_TOOLCHAIN_PATH` to the absolute path to the toolchain or otherwise configure your editor to use this toolchain. See [Toolchains](#toolchains) for more information.
 
 2. Build the language server executable `sourcekit-lsp` using `swift build`. See [Building](#building-sourcekit-lsp) for more information.
 
@@ -73,7 +73,7 @@ SourceKit-LSP depends on tools such as `sourcekitd` and `clangd`, which it loads
 
 ### Recommended Toolchain
 
-Use the `swift-DEVELOPMENT-SNAPSHOT-2018-12-07-a` toolchain snapshot from https://swift.org/download/#snapshots. SourceKit-LSP is still early in its development and we are actively adding functionality to the toolchain to support it.
+Use the `swift-DEVELOPMENT-SNAPSHOT-2018-12-18-a` toolchain snapshot from https://swift.org/download/#snapshots. SourceKit-LSP is still early in its development and we are actively adding functionality to the toolchain to support it.
 
 ### Selecting the Toolchain