Update references to 'master' to 'main'

CONTRIBUTING.md

@@ -6,6 +6,6 @@ license](https://swift.org/LICENSE.txt).
 ---
 
 Before submitting the pull request, please make sure you have [tested your
-changes](https://github.com/apple/swift/blob/master/docs/ContinuousIntegration.md)
+changes](https://github.com/apple/swift/blob/main/docs/ContinuousIntegration.md)
 and that they follow the Swift project [guidelines for contributing
 code](https://swift.org/contributing/#contributing-code).

Documentation/Development.md

@@ -14,7 +14,7 @@ This document contains notes about development and testing of SourceKit-LSP.
 
 For maximum compatibility with toolchain components such as the Swift Package Manager, the only supported way to develop SourceKit-LSP is with the latest toolchain snapshot. We make an effort to keep the build and tests working with the latest release of Swift, but this is not always possible.
 
-1. Install the latest master toolchain snapshot from https://swift.org/download/#snapshots. **If you're looking for swift-5.x**, use the `swift-5.x-branch` of SourceKit-LSP with the latest swift-5.x toolchain snapshot. See [Toolchains](#toolchains) for more information.
+1. Install the latest "Trunk Development (main)" toolchain snapshot from https://swift.org/download/#snapshots. **If you're looking for swift-5.x**, use the `swift-5.x-branch` of SourceKit-LSP with the latest swift-5.x toolchain snapshot. 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.
 
@@ -24,7 +24,7 @@ For maximum compatibility with toolchain components such as the Swift Package Ma
 
 ## Building SourceKit-LSP
 
-Install the latest snapshot from https://swift.org/download/#snapshots. SourceKit-LSP builds with the latest toolchain snapshot of the corresponding branch (e.g. to build the *master* branch, use the latest *master* snapshot of the toolchain). See [Toolchains](#toolchains) for more information about supported toolchains.
+Install the latest snapshot from https://swift.org/download/#snapshots. SourceKit-LSP builds with the latest toolchain snapshot of the corresponding branch (e.g. to build the *main* branch, use the latest *main* snapshot of the toolchain). See [Toolchains](#toolchains) for more information about supported toolchains.
 
 SourceKit-LSP is built using the [Swift Package Manager](https://github.com/apple/swift-package-manager). For a standard debug build on the command line:
 
@@ -58,7 +58,7 @@ Use the latest toolchain snapshot from https://swift.org/download/#snapshots. So
 
 | SourceKit-LSP branch | Toolchain |
 |:---------------------|:----------|
-| master               | Trunk Development (master) |
+| main                 | Trunk Development (main) |
 | swift-5.2-branch     | Swift 5.2 Development |
 | swift-5.1-branch     | Swift 5.1.1+ |
 
@@ -178,4 +178,4 @@ Position(ws.testLoc("aaa:call"))
 ## Tibs
 
 We use Tibs, the "Test Index Build System" from the IndexStoreDB project to provide build system support for test projects, including getting compiler arguments and building an index. 
-For much more information about Tibs, see [IndexStoreDB/Documentation/Tibs.md](https://github.com/apple/indexstore-db/blob/master/Documentation/Tibs.md).
+For much more information about Tibs, see [IndexStoreDB/Documentation/Tibs.md](https://github.com/apple/indexstore-db/blob/main/Documentation/Tibs.md).

Package.swift

@@ -229,9 +229,9 @@ import Darwin.C
 if getenv("SWIFTCI_USE_LOCAL_DEPS") == nil {
   // Building standalone.
   package.dependencies += [
-    .package(url: "https://github.com/apple/indexstore-db.git", .branch("master")),
-    .package(url: "https://github.com/apple/swift-package-manager.git", .branch("master")),
-    .package(url: "https://github.com/apple/swift-tools-support-core.git", .branch("master")),
+    .package(url: "https://github.com/apple/indexstore-db.git", .branch("main")),
+    .package(url: "https://github.com/apple/swift-package-manager.git", .branch("main")),
+    .package(url: "https://github.com/apple/swift-tools-support-core.git", .branch("main")),
     .package(url: "https://github.com/apple/swift-argument-parser.git", .upToNextMinor(from: "0.3.0")),
   ]
 } else {

README.md

@@ -1,6 +1,6 @@
 # SourceKit-LSP
 
-SourceKit-LSP is an implementation of the [Language Server Protocol](https://microsoft.github.io/language-server-protocol/) (LSP) for Swift and C-based languages. It provides features like code-completion and jump-to-definition to editors that support LSP. SourceKit-LSP is built on top of [sourcekitd](https://github.com/apple/swift/tree/master/tools/SourceKit) and [clangd](https://clang.llvm.org/extra/clangd.html) for high-fidelity language support, and provides a powerful source code index as well as cross-language support. SourceKit-LSP supports projects that use the Swift Package Manager.
+SourceKit-LSP is an implementation of the [Language Server Protocol](https://microsoft.github.io/language-server-protocol/) (LSP) for Swift and C-based languages. It provides features like code-completion and jump-to-definition to editors that support LSP. SourceKit-LSP is built on top of [sourcekitd](https://github.com/apple/swift/tree/main/tools/SourceKit) and [clangd](https://clang.llvm.org/extra/clangd.html) for high-fidelity language support, and provides a powerful source code index as well as cross-language support. SourceKit-LSP supports projects that use the Swift Package Manager.
 
 ## Getting Started
 

Sources/SourceKitLSP/Swift/CursorInfo.swift

@@ -30,7 +30,7 @@ struct CursorInfo {
   var annotatedDeclaration: String?
 
   /// The documentation comment XML string. The schema is at
-  /// https://github.com/apple/swift/blob/master/bindings/xml/comment-xml-schema.rng
+  /// https://github.com/apple/swift/blob/main/bindings/xml/comment-xml-schema.rng
   var documentationXML: String?
 
   /// The refactor actions available at this position.