Fix wasm build

.github/workflows/wasm.yml

@@ -14,4 +14,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: swiftwasm/swiftwasm-action@v5.4
+      - uses: swiftwasm/swiftwasm-action@v5.7

Sources/Nimble/DSL+AsyncAwait.swift

@@ -1,4 +1,6 @@
+#if !os(WASI)
 import Dispatch
+#endif
 
 private func convertAsyncExpression<T>(_ asyncExpression: () async throws -> T) async -> (() throws -> T) {
     let result: Result<T, Error>
@@ -46,6 +48,8 @@ public func expect(file: FileString = #file, line: UInt = #line, _ expression: (
             isClosure: true))
 }
 
+#if !os(WASI)
+
 /// Wait asynchronously until the done closure is called or the timeout has been reached.
 ///
 /// @discussion
@@ -113,3 +117,5 @@ private func throwableUntil(
             break
         }
 }
+
+#endif // #if !os(WASI)

Sources/Nimble/Polling+AsyncAwait.swift

@@ -1,3 +1,5 @@
+#if !os(WASI)
+
 import Dispatch
 
 @MainActor
@@ -166,3 +168,5 @@ extension SyncExpectation {
         return await toAlways(predicate, until: until, pollInterval: pollInterval, description: description)
     }
 }
+
+#endif // #if !os(WASI)

Tests/NimbleTests/StatusTest.swift

@@ -37,6 +37,7 @@ final class StatusTest: XCTestCase {
         }
     }
 
+    #if !os(WASI)
     func testAsync() {
         producesStatus(.passed) {
             expect(true).toEventually(beTrue())
@@ -46,4 +47,5 @@ final class StatusTest: XCTestCase {
             expect(true).toEventually(beFalse())
         }
     }
+    #endif
 }