Pin fast-xml-parser to v3.17.4 (#280)

Author: trivikr

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/TypeScriptDependency.java

@@ -74,7 +74,7 @@ public enum TypeScriptDependency implements SymbolDependencyContainer {
 
     // Conditionally added when interacting with specific protocol test bodyMediaType values.
     AWS_SDK_QUERYSTRING_BUILDER("dependencies", "@aws-sdk/querystring-builder", "3.6.1", false),
-    XML_PARSER("dependencies", "fast-xml-parser", "^3.16.0", false);
+    XML_PARSER("dependencies", "fast-xml-parser", "3.17.4", false);
 
     public static final String NORMAL_DEPENDENCY = "dependencies";
     public static final String DEV_DEPENDENCY = "devDependencies";