JS: support additional import statements for Flow

javascript/extractor/tests/flow/input/importNonTypeInDeclaredModule.js

@@ -0,0 +1,7 @@
+declare module "m1" {
+  import {
+    T1,
+    T2
+  } from "m2"
+}
+  

javascript/extractor/tests/flow/input/importType.js

@@ -1,2 +1,3 @@
 import { type, type t1, typeof t2 } from 'm';
 import { type t } from 'n';
+import type { t } from 'o';

javascript/extractor/tests/flow/input/importTypeInDeclaredModule.js

@@ -0,0 +1,11 @@
+declare module "m1" {
+  import type {
+    T1,
+    T2
+  } from "m2"
+    import typeof {
+    T3,
+    T4
+  } from "m3"
+}
+