feat(emscripten): bump up emscripten

kwonoj · kwonoj · commit 33acfa3d3b5f · 2020-01-31T19:40:27.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,7 @@ services:
 env:
   global:
     - DOCKER_REPO='ojkwon/arch-emscripten'
-    - EMSCRIPTEN_VERSION=1.39.0
+    - EMSCRIPTEN_VERSION=1.39.6
     - PROTOBUF_VERSION=3.9.0
   matrix:
     - BUILD_TARGET='base'
