fix(regex): [dynamic] ignore matches in string literals

- https://regex101.com/r/PTPAvU/27

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

src/__tests__/import-dynamic.spec.ts

@@ -12,23 +12,32 @@ describe('unit:DYNAMIC_IMPORT_REGEX', () => {
     TEST_SUBJECT.lastIndex = 0
   })
 
-  describe('comments', () => {
-    it('should ignore import in multi-line comment', () => {
-      // Arrange
-      const code = dedent`
-        /**
-         * @example
-         *  const { readPackage } = await import('read-pkg')
-         */
-      `
+  it('should ignore match in multi-line comment', () => {
+    // Arrange
+    const code = dedent`
+      /**
+       * @example
+       *  const { readPackage } = await import('read-pkg')
+       */
+    `
+
+    // Act + Expect
+    expect(TEST_SUBJECT.test(code)).to.be.false
+  })
 
-      // Act + Expect
-      expect(TEST_SUBJECT.test(code)).to.be.false
-    })
+  it('should ignore match in single-line comment', () => {
+    expect(TEST_SUBJECT.test('// await import("./init.mjs")')).to.be.false
+  })
 
-    it('should ignore import in single-line comment', () => {
-      expect(TEST_SUBJECT.test('// await import("./init.mjs")')).to.be.false
-    })
+  it('should ignore match in string literal', () => {
+    // Arrange
+    const code = dedent`
+      const str1 = 'await import("foo")'
+      const str2 = "await import('foo')"
+    `
+
+    // Act + Expect
+    expect(TEST_SUBJECT.test(code)).to.be.false
   })
 
   describe('conditional imports', () => {

src/import-dynamic.ts

@@ -76,6 +76,6 @@
  * @const {RegExp} DYNAMIC_IMPORT_REGEX
  */
 const DYNAMIC_IMPORT_REGEX: RegExp =
-  /(?<=^|[\s;])(?:(?:const\s*|let\s*|var\s*)?(?<imports>(?:[$_\p{ID_Start}][$\u200C\u200D\p{ID_Continue}]*)|(?<=const\s*|let\s*|var\s*)(?:[\w\t\n\r "$'*,./:{}-]+?))\s*=\s*)?(?:await\s+)?(?<expression>import\((?<specifier>[\S\t\n\r]+?)(?:,\s*(?<options>\{\s*assert:.+[\w\t\n\r "':]+\}\s*\}))?\))(?<!(?:\/\/|\*).*)/gu
+  /(?<=^|[\n;](?:[\t ]*(?:\w+ )?)?)(?:(?:const\s*|let\s*|var\s*)?(?<imports>(?:[$_\p{ID_Start}][$\u200C\u200D\p{ID_Continue}]*)|(?<=const\s*|let\s*|var\s*)(?:[\w\t\n\r "$'*,./:{}-]+?))\s*=\s*)?(?:await\s+)?(?<expression>import\((?<specifier>[\S\t\n\r]+?)(?:,\s*(?<options>\{\s*assert:.+[\w\t\n\r "':]+\}\s*\}))?\))/gu
 
 export default DYNAMIC_IMPORT_REGEX