Fix race condition in wasm test (#4740)

src/lang/wasm.test.ts

@@ -1,9 +1,13 @@
 import { err } from 'lib/trap'
-import { parse, ParseResult } from './wasm'
+import { initPromise, parse, ParseResult } from './wasm'
 import { enginelessExecutor } from 'lib/testHelpers'
 import { Node } from 'wasm-lib/kcl/bindings/Node'
 import { Program } from '../wasm-lib/kcl/bindings/Program'
 
+beforeEach(async () => {
+  await initPromise
+})
+
 it('can execute parsed AST', async () => {
   const code = `x = 1
 // A comment.`