include node_modules so release .zip is deployable

node_modules/@smithy/signature-v4/dist-cjs/headerUtil.js

@@ -0,0 +1,32 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.deleteHeader = exports.getHeaderValue = exports.hasHeader = void 0;
+const hasHeader = (soughtHeader, headers) => {
+    soughtHeader = soughtHeader.toLowerCase();
+    for (const headerName of Object.keys(headers)) {
+        if (soughtHeader === headerName.toLowerCase()) {
+            return true;
+        }
+    }
+    return false;
+};
+exports.hasHeader = hasHeader;
+const getHeaderValue = (soughtHeader, headers) => {
+    soughtHeader = soughtHeader.toLowerCase();
+    for (const headerName of Object.keys(headers)) {
+        if (soughtHeader === headerName.toLowerCase()) {
+            return headers[headerName];
+        }
+    }
+    return undefined;
+};
+exports.getHeaderValue = getHeaderValue;
+const deleteHeader = (soughtHeader, headers) => {
+    soughtHeader = soughtHeader.toLowerCase();
+    for (const headerName of Object.keys(headers)) {
+        if (soughtHeader === headerName.toLowerCase()) {
+            delete headers[headerName];
+        }
+    }
+};
+exports.deleteHeader = deleteHeader;