feat(syntax): detect dynamic imports in commonjs

- https://nodejs.org/api/esm.html#import-expressions

Signed-off-by: Lexus Drumgold <unicornware@flexdevelopment.llc>

Author: unicornware

src/internal/constants.ts

@@ -11,7 +11,7 @@
  * @const {RegExp} CJS_SYNTAX_REGEX
  */
 export const CJS_SYNTAX_REGEX: RegExp =
-  /(?<!(?:\/\/|\*).*)((?:module\.)?exports(?:\.\w+|(?<!\s+=))|require(?=\(.)|require\.\w+|__dirname|__filename)/gm
+  /(?<!(?:\/\/|\*).*)((?:module\.)?exports(?:\.\w+|(?<!\s+=))|require(?=\(.)|require\.\w+|__dirname|__filename|await import)/gm
 
 /**
  * Dynamic import statement regex.

src/lib/__tests__/has-cjs-syntax.spec.ts

@@ -64,6 +64,29 @@ describe('unit:lib/hasCJSSyntax', () => {
     })
   })
 
+  describe('await import', () => {
+    it('should detect await import', () => {
+      expect(testSubject('await import("read-pkg")')).to.be.true
+    })
+
+    it('should ignore await import in multi-line comment', () => {
+      // Arrange
+      const code = dedent`
+        /**
+         * @example
+         *  await import('read-pkg')
+         */
+      `
+
+      // Act + Expect
+      expect(testSubject(code)).to.be.false
+    })
+
+    it('should ignore await import in single-line comment', () => {
+      expect(testSubject('// await import("read-pkg")')).to.be.false
+    })
+  })
+
   describe('exports', () => {
     it('should detect default export', () => {
       expect(testSubject('exports = {}')).to.be.true