chore: update deps

BREAKING CHANGE: drop nodejs v6.x support

package.json

@@ -16,7 +16,7 @@
   },
   "repository": "kukhariev/diskinfo",
   "engines": {
-    "node": ">= 6.0.0"
+    "node": ">= 8.0.0"
   },
   "license": "MIT",
   "files": [
@@ -25,10 +25,7 @@
   "main": "lib/index.js",
   "typings": "lib/index.d.ts",
   "scripts": {
-    "clean": "rimraf lib",
-    "ci": "npm run lint && npm run clean && npm run build",
     "test": "mocha",
-    "test:watch": "mocha --watch",
     "build": "tsc",
     "lint": "tslint -c tslint.json -p tsconfig.json"
   },
@@ -37,10 +34,9 @@
     "@types/mocha": "5.2.7",
     "@types/node": "10.17.13",
     "chai": "4.2.0",
-    "mocha": "6.2.2",
-    "rimraf": "3.0.0",
-    "ts-node": "8.5.4",
+    "mocha": "7.0.0",
     "tslint": "5.20.1",
+    "ts-node": "8.5.4",
     "typescript": "3.7.4"
   }
 }

test/diskinfo.spec.ts

@@ -6,14 +6,17 @@ describe(`diskinfo`, () => {
     const dfout = await diskinfo();
     expect(dfout[0]).to.include.keys('fstype', 'size', 'used', 'avail', 'pcent', 'target');
   });
+
   it('should get current disk info (folder)', async () => {
     const dfout = await diskinfo('./');
     expect(dfout).to.include.keys('fstype', 'size', 'used', 'avail', 'pcent', 'target');
   });
+
   it('should get current disk info (file)', async () => {
     const dfout = await diskinfo('package.json');
     expect(dfout).to.include.keys('fstype', 'size', 'used', 'avail', 'pcent', 'target');
   });
+
   it('should fails if file path is wrong', async () => {
     let error: Error;
     try {