Release prep for 9.0a3

projects/tor-browser/Bundle-Data/Docs/ChangeLog.txt

+Tor Browser 9.0a3 -- June 20 2019
+ * All platforms
+   * Pick up fix for Mozilla's bug 1544386
+   * Update NoScript to 10.6.3
+     * Bug 29904: NoScript blocks MP4 on higher security levels
+     * Bug 30624+29043+29647: Prevent XSS protection from freezing the browser
+
 Tor Browser 9.0a2 -- June 11 2019
  * All platforms
    * Update Torbutton to 2.2

rbm.conf

@@ -24,10 +24,10 @@ buildconf:
   git_signtag_opt: '-s'
 
 var:
-  torbrowser_version: '9.0a2'
-  torbrowser_build: 'build2'
+  torbrowser_version: '9.0a3'
+  torbrowser_build: 'build1'
   torbrowser_incremental_from:
-    - 9.0a1
+    - 9.0a2
   project_name: tor-browser
   multi_lingual: 0
   build_mar: 1