Update devDependencies and gems.

package.json

@@ -114,7 +114,7 @@
     "broken-link-checker": "^0.7.8",
     "bundlesize": "^0.18.0",
     "clean-css-cli": "^4.3.0",
-    "coveralls": "^3.0.5",
+    "coveralls": "^3.0.6",
     "cross-env": "^5.2.0",
     "eslint": "^5.16.0",
     "find-unused-sass-variables": "^0.4.1",
@@ -125,10 +125,10 @@
     "jquery": "^3.4.1",
     "karma": "^3.1.4",
     "karma-browserstack-launcher": "1.4.0",
-    "karma-chrome-launcher": "^3.0.0",
+    "karma-chrome-launcher": "^3.1.0",
     "karma-coverage-istanbul-reporter": "^2.1.0",
     "karma-detect-browsers": "^2.3.3",
-    "karma-firefox-launcher": "^1.1.0",
+    "karma-firefox-launcher": "^1.2.0",
     "karma-qunit": "^3.1.3",
     "karma-sinon": "^1.0.5",
     "node-sass": "^4.12.0",
@@ -137,13 +137,13 @@
     "popper.js": "^1.15.0",
     "postcss-cli": "^6.1.3",
     "qunit": "^2.9.2",
-    "rollup": "^1.17.0",
+    "rollup": "^1.19.4",
     "rollup-plugin-babel": "^4.3.3",
-    "rollup-plugin-commonjs": "^10.0.1",
+    "rollup-plugin-commonjs": "^10.0.2",
     "rollup-plugin-node-resolve": "^5.2.0",
     "shelljs": "^0.8.3",
     "shx": "^0.3.2",
-    "sinon": "^7.3.2",
+    "sinon": "^7.4.1",
     "stylelint": "^9.10.1",
     "stylelint-config-twbs-bootstrap": "^0.4.0",
     "uglify-js": "^3.6.0",