Add changenote

Author: aibaars

javascript/ql/lib/change-notes/2023-10-10-import-attributes.md

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+---
+category: minorAnalysis
+---
+* [Import attributes](https://github.com/tc39/proposal-import-attributes) are now supported in JavaScript code.
+  Note that import attributes are an evolution of an earlier proposal called "import assertions", which were implemented in TypeScript 4.5.
+  The QL library includes new predicates named `getImportAttributes()` that should be used in favor of the now deprecated `getImportAssertion()`;
+  in addition, the `getImportAttributes()` method of the `DynamicImportExpr` has been renamed to `getImportOptions()`.