chore(deps): update devDeps, rem Node 8 from Travis (#490)

Node 8 is out of LTS, and holding us back on karma & puppeteer

Author: STRML

.travis.yml

@@ -1,6 +1,5 @@
 language: node_js
 node_js:
-  - "8"
   - "10"
   - "12"
   - "node" # latest

package.json

@@ -39,23 +39,23 @@
   "homepage": "https://github.com/mzabriskie/react-draggable",
   "devDependencies": {
     "@babel/cli": "^7.8.4",
-    "@babel/core": "^7.9.0",
+    "@babel/core": "^7.9.6",
     "@babel/plugin-proposal-class-properties": "^7.8.3",
     "@babel/plugin-transform-flow-comments": "^7.8.3",
-    "@babel/preset-env": "^7.9.5",
+    "@babel/preset-env": "^7.9.6",
     "@babel/preset-flow": "^7.9.0",
     "@babel/preset-react": "^7.9.4",
-    "@types/react": "^16.9.34",
-    "@types/react-dom": "^16.9.6",
+    "@types/react": "^16.9.35",
+    "@types/react-dom": "^16.9.8",
     "babel-eslint": "^10.1.0",
     "babel-loader": "^8.1.0",
     "babel-plugin-espower": "^3.0.1",
     "babel-plugin-transform-inline-environment-variables": "^0.4.3",
-    "eslint": "^6.8.0",
-    "eslint-plugin-react": "^7.19.0",
-    "flow-bin": "^0.123.0",
+    "eslint": "^7.0.0",
+    "eslint-plugin-react": "^7.20.0",
+    "flow-bin": "^0.125.1",
     "jasmine-core": "^3.5.0",
-    "karma": "^4.4.1",
+    "karma": "^5.0.9",
     "karma-chrome-launcher": "^3.1.0",
     "karma-cli": "2.0.0",
     "karma-firefox-launcher": "^1.3.0",
@@ -68,17 +68,17 @@
     "phantomjs-prebuilt": "^2.1.16",
     "power-assert": "^1.4.4",
     "pre-commit": "^1.2.2",
-    "puppeteer": "^3.0.0",
+    "puppeteer": "^3.1.0",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
-    "react-frame-component": "^4.1.1",
+    "react-frame-component": "^4.1.2",
     "react-test-renderer": "^16.13.1",
     "semver": "^7.3.2",
     "static-server": "^3.0.0",
-    "typescript": "^3.8.3",
-    "webpack": "^4.42.1",
+    "typescript": "^3.9.3",
+    "webpack": "^4.43.0",
     "webpack-cli": "^3.3.11",
-    "webpack-dev-server": "^3.10.3"
+    "webpack-dev-server": "^3.11.0"
   },
   "resolutions": {
     "minimist": "^1.2.5"
@@ -91,4 +91,4 @@
     "classnames": "^2.2.5",
     "prop-types": "^15.6.0"
   }
-}
+}