fix: update dependencies

Author: gajus

package.json

@@ -5,8 +5,17 @@
     "url": "http://gajus.com"
   },
   "ava": {
+    "files": [
+      "test/**/*"
+    ],
+    "helpers": [
+      "test/helpers/**/*"
+    ],
     "require": [
       "@babel/register"
+    ],
+    "sources": [
+      "src/**/*"
     ]
   },
   "bin": "./dist/bin/index.js",
@@ -26,16 +35,16 @@
     "@babel/plugin-transform-flow-strip-types": "^7.4.4",
     "@babel/preset-env": "^7.4.5",
     "@babel/register": "^7.4.4",
-    "ava": "^1.4.1",
+    "ava": "^2.1.0",
     "babel-plugin-istanbul": "^5.1.4",
-    "coveralls": "^3.0.3",
+    "coveralls": "^3.0.4",
     "eslint": "^5.16.0",
     "eslint-config-canonical": "^17.1.0",
-    "flow-bin": "^0.99.0",
+    "flow-bin": "^0.101.0",
     "flow-copy-source": "^2.0.6",
-    "husky": "^2.3.0",
+    "husky": "^2.4.1",
     "nyc": "^14.1.1",
-    "semantic-release": "^15.13.12"
+    "semantic-release": "^15.13.16"
   },
   "engines": {
     "node": ">=8"