Add types for timeout option in Analytics constructor (#40706)

This is passed to axios to control HTTP request timeouts

types/analytics-node/analytics-node-tests.ts

@@ -6,7 +6,18 @@ function testConfig(): void {
     flushAt: 20,
     flushInterval: 10000,
     host: "http://example.com",
-    enable: true
+    enable: true,
+    timeout: 1000,
+  });
+}
+
+function testConfigWithStringTimeout(): void {
+  analytics = new Analytics('YOUR_WRITE_KEY', {
+    flushAt: 20,
+    flushInterval: 10000,
+    host: "http://example.com",
+    enable: true,
+    timeout: '1000',
   });
 }
 

types/analytics-node/index.d.ts

@@ -43,7 +43,8 @@ declare namespace AnalyticsNode {
       flushAt?: number,
       flushInterval?: number,
       host?: string,
-      enable?: boolean
+      enable?: boolean,
+      timeout?: number | string,
     });
 
     /* The identify method lets you tie a user to their actions and record