chore: update test deps and conf (#14735)

* test: run in headless chrome

* chore: update travis node version

* chore: upgrade test deps

* test: fix tests

* test: support async await

* test: fix tree test case

* test: fix tree test cases

* test: fix popper test case

package.json

@@ -81,10 +81,11 @@
     "babel-plugin-transform-vue-jsx": "^3.7.0",
     "babel-preset-env": "^1.7.0",
     "babel-preset-stage-2": "^6.24.1",
-    "chai": "^3.5.0",
+    "babel-regenerator-runtime": "^6.5.0",
+    "chai": "^4.2.0",
     "chokidar": "^1.7.0",
     "copy-webpack-plugin": "^5.0.0",
-    "coveralls": "^2.11.14",
+    "coveralls": "^3.0.3",
     "cp-cli": "^1.0.2",
     "cross-env": "^3.1.3",
     "css-loader": "^2.1.0",
@@ -104,20 +105,20 @@
     "html-webpack-plugin": "^3.2.0",
     "json-loader": "^0.5.7",
     "json-templater": "^1.0.4",
-    "karma": "^1.3.0",
+    "karma": "^4.0.1",
     "karma-chrome-launcher": "^2.2.0",
-    "karma-coverage": "^1.1.1",
-    "karma-mocha": "^1.2.0",
-    "karma-sinon-chai": "^1.2.4",
+    "karma-coverage": "^1.1.2",
+    "karma-mocha": "^1.3.0",
+    "karma-sinon-chai": "^2.0.2",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-spec-reporter": "0.0.26",
-    "karma-webpack": "^3.0.0",
+    "karma-spec-reporter": "^0.0.32",
+    "karma-webpack": "^3.0.5",
     "markdown-it": "^8.4.1",
     "markdown-it-anchor": "^5.0.2",
     "markdown-it-chain": "^1.3.0",
     "markdown-it-container": "^2.0.0",
     "mini-css-extract-plugin": "^0.4.1",
-    "mocha": "^3.1.1",
+    "mocha": "^6.0.2",
     "node-sass": "^4.11.0",
     "optimize-css-assets-webpack-plugin": "^5.0.1",
     "perspective.js": "^1.0.0",
@@ -126,8 +127,8 @@
     "rimraf": "^2.5.4",
     "sass-loader": "^7.1.0",
     "select-version-cli": "^0.0.2",
-    "sinon": "^1.17.6",
-    "sinon-chai": "^2.8.0",
+    "sinon": "^7.2.7",
+    "sinon-chai": "^3.3.0",
     "style-loader": "^0.23.1",
     "transliteration": "^1.1.11",
     "uglifyjs-webpack-plugin": "^2.1.1",