Making .tracing computed var in Context public

Author: Igor Milyakov

Sources/TSCUtility/Tracing.swift

@@ -122,7 +122,7 @@ extension Context {
         return self
     }
 
-    var tracing: Tracing.Collection? {
+    public var tracing: Tracing.Collection? {
         get {
             guard let collection = self[ObjectIdentifier(Tracing.Collection.self)] as? Tracing.Collection else {
                 return nil

Tests/TSCUtilityTests/TracingTests.swift

@@ -19,7 +19,8 @@ class TracingTests: XCTestCase {
         collection.events.append(event2)
         XCTAssertEqual(collection.events.count, 2)
         var ctx = Context()
-        ctx.set(collection)
-        XCTAssertEqual(ctx.get(Tracing.Collection.self).events.count, 2)
+        ctx.tracing = collection
+        XCTAssertEqual(ctx.tracing?.events.count, 2)
+
     }
 }