Update deps

Author: bcomnes

package.json

@@ -38,7 +38,7 @@
     "backoff": "^2.5.0",
     "clean-deep": "^3.0.2",
     "debug": "^4.1.1",
-    "flush-write-stream": "^1.0.3",
+    "flush-write-stream": "^2.0.0",
     "folder-walker": "^3.2.0",
     "from2-array": "0.0.4",
     "hasha": "^3.0.0",
@@ -65,14 +65,14 @@
     "@babel/plugin-transform-runtime": "^7.1.0",
     "@babel/preset-env": "^7.3.1",
     "@babel/runtime": "^7.3.1",
-    "ava": "1.0.0-rc.2",
+    "ava": "1.2.1",
     "babel-eslint": "^10.0.1",
     "babel-loader": "^8.0.5",
     "body": "^5.1.0",
     "coveralls": "^3.0.2",
     "dependency-check": "^3.3.0",
     "eslint": "^5.14.1",
-    "eslint-config-prettier": "^3.6.0",
+    "eslint-config-prettier": "^4.0.0",
     "eslint-plugin-import": "^2.16.0",
     "eslint-plugin-node": "^8.0.1",
     "eslint-plugin-prettier": "^3.0.1",