deps: update assorted dependencies (#175)

.travis.yml

@@ -4,7 +4,6 @@ matrix:
     - node_js: "8"
     - node_js: "10"
     - node_js: "12"
-dist: trusty
 sudo: required
 cache:
   yarn: true
@@ -13,18 +12,13 @@ cache:
 install:
   - yarn
 before_script:
-  - export DISPLAY=:99.0
   - export CHROME_PATH="$(pwd)/chrome-linux/chrome"
-  - sh -e /etc/init.d/xvfb start
-  - sleep 3 # wait for xvfb to boot
   - yarn build
 script:
   - yarn test-formatting
   - yarn type-check
   - yarn test
-after_success:
-  - yarn run coverage
-# - (send to coveralls)
-# - (send to codecov)
 addons:
   chrome: stable
+services:
+  - xvfb

package.json

@@ -5,7 +5,6 @@
     "build": "tsc",
     "dev": "tsc -w",
     "test": "mocha --require ts-node/register --reporter=dot test/**/*-test.ts --timeout=10000",
-    "coverage": "nyc yarn test && nyc report --reporter=text-lcov > lcov.info",
     "test-formatting": "test/check-formatting.sh",
     "format": "scripts/format.sh",
     "type-check": "tsc --allowJs --checkJs --noEmit --target es2016 *.js"
@@ -17,7 +16,6 @@
     "@types/sinon": "^2.3.1",
     "clang-format": "^1.0.50",
     "mocha": "^6.1.4",
-    "nyc": "^11.0.2",
     "sinon": "^2.3.5",
     "ts-node": "8.3.0",
     "typescript": "3.2.2"