Vector of unions for TS/JS and PHP (#4404)

* Eclipse ignore

* TypeScript support

* Prefixing enums

* Test results

* Merged JS and TS generators

* Fixed AppVeyor build problems

* Fixed more AppVeyor build problems

* Fixed more AppVeyor build problems

* Changed TS flag to options struct

* Storing options by value

* Removed unneeded const

* Re-export support for unions

* Uint support

* Casting bools to numbers for mutation

* TS shell tests

* Reverted generates js test file to original version

* Backing up js tests and properly generating test data

* Not importing flatbuffers for TS test generation

* Not overwriting generated js for tests

* AppVeyor test fixes

* Generating the most strict TS code possible

* Not returning null when creating vectors

* Not returning null from struct contructors

* Vector of unions for ts/js

* Sanity check for languages

* Indentation fix + output test files

* Vectors of unions for php

* Fixes to union vector handling + tests

tests/union_vector/Character.php

@@ -0,0 +1,33 @@
+<?php
+// automatically generated by the FlatBuffers compiler, do not modify
+
+namespace ;
+
+class Character
+{
+    const NONE = 0;
+    const MuLan = 1;
+    const Rapunzel = 2;
+    const Belle = 3;
+    const BookFan = 4;
+    const Other = 5;
+    const Unused = 6;
+
+    private static $names = array(
+        "NONE",
+        "MuLan",
+        "Rapunzel",
+        "Belle",
+        "BookFan",
+        "Other",
+        "Unused",
+    );
+
+    public static function Name($e)
+    {
+        if (!isset(self::$names[$e])) {
+            throw new \Exception();
+        }
+        return self::$names[$e];
+    }
+}