travis update, testing node 12 compat

.travis.yml

@@ -12,6 +12,7 @@ before_install:
   - sudo apt-get install -y libstdc++6
   - sudo apt-get install -y libxi-dev
 node_js:
+  - "12"
   - "10"
   - "8"
 before_script:

README.md

@@ -119,8 +119,6 @@ If node complains about a missine acorn peer dependency, run the following comma
     npm update acorn --depth 20
     npm dedupe
 
-If the `gl` package does not compile on node 12 (there are currently no pre-built binaries) revert back to node 10.
-
 ### Editor
 
 To get syntax highlighting for the shader files add the following to Visual Code's settings files