(ci): use Node 10 Active LTS

agilgur5 · agilgur5 · commit 3110f94d468a · 2019-11-19T00:24:09.000-05:00
- Node 8 Maintenance LTS is EOL in Jan 2020
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 # default is the very old 0.10.48; match local version instead
-node_js: '8.9'
+node_js: '10.16.0'
 
 script: npm test -- --coverage
 after_script:
