Upgrade to babel-eslint@10.1.0 and eslint@6.8.0

Author: Micael Rodrigues

.travis.yml

@@ -1,7 +1,6 @@
 language: node_js
 
 node_js:
-  - 8
   - 10
 
 sudo: false

package.json

@@ -42,7 +42,7 @@
     }
   },
   "dependencies": {
-    "babel-eslint": "10.0.1",
+    "babel-eslint": "10.1.0",
     "eslint-plugin-flowtype": "3.13.0",
     "eslint-plugin-jest": "22.4.1",
     "eslint-plugin-mocha": "5.3.0",
@@ -56,7 +56,7 @@
     "eslint-plugin-switch-case": "^1.1.2"
   },
   "devDependencies": {
-    "eslint": "6.5.1",
+    "eslint": "6.8.0",
     "lint-staged": "^8.1.5",
     "mocha": "6.0.2",
     "pre-commit": "^1.2.2",
@@ -67,7 +67,7 @@
     "eslint": "5 || 6"
   },
   "engines": {
-    "node": ">=8"
+    "node": ">=10"
   },
   "options": {
     "mocha": "-t 10000 --require should test"