chore: update dependencies, small code-style fixes

.flowconfig

@@ -37,4 +37,3 @@
 [options]
 esproposal.class_instance_fields=enable
 suppress_comment= \\(.\\|\n\\)*\\$FlowFixMe
-unsafe.enable_getters_and_setters=true

package.json

@@ -33,27 +33,27 @@
   },
   "devDependencies": {
     "babel-cli": "^6.26.0",
-    "babel-eslint": "^8.2.1",
-    "babel-jest": "^22.1.0",
+    "babel-eslint": "^8.2.2",
+    "babel-jest": "^22.4.1",
     "babel-plugin-transform-class-properties": "^6.24.1",
     "babel-plugin-transform-flow-strip-types": "^6.22.0",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-polyfill": "^6.26.0",
     "babel-preset-env": "^1.6.1",
     "babel-register": "^6.26.0",
     "cz-conventional-changelog": "^2.1.0",
-    "eslint": "^4.16.0",
+    "eslint": "^4.18.1",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-module-utils": "^2.1.1",
-    "eslint-plugin-import": "^2.8.0",
-    "eslint-plugin-prettier": "^2.5.0",
-    "fetch-mock": "^5.13.1",
-    "flow-bin": "^0.64.0",
-    "form-data": "^2.3.1",
-    "jest": "^22.1.4",
-    "prettier": "^1.10.2",
-    "relay-runtime": "^1.4.1",
+    "eslint-plugin-import": "^2.9.0",
+    "eslint-plugin-prettier": "^2.6.0",
+    "fetch-mock": "^6.0.1",
+    "flow-bin": "^0.66.0",
+    "form-data": "^2.3.2",
+    "jest": "^22.4.2",
+    "prettier": "^1.11.0",
+    "relay-runtime": "^1.5.0",
     "rimraf": "^2.6.2",
     "semantic-release": "^12.4.1"
   },
@@ -76,7 +76,8 @@
     "lint": "eslint src test *.js",
     "coverage": "jest --coverage --maxWorkers 2",
     "watch": "jest --watch",
-    "test": "npm run coverage && npm run lint",
+    "flow": "flow",
+    "test": "npm run coverage && npm run lint && npm run flow",
     "semantic-release": "semantic-release"
   }
 }

src/RelayRequestBatch.js

@@ -18,7 +18,7 @@ export default class RelayRequestBatch {
     };
   }
 
-  setFetchOption(name, value: mixed) {
+  setFetchOption(name: string, value: mixed) {
     this.fetchOpts[name] = value;
   }
 

src/middlewares/__tests__/auth-test.js

@@ -76,7 +76,7 @@ describe('middlewares/auth', () => {
             body: { data: 'PAYLOAD' },
           };
         }
-        return { status: 401 };
+        return { status: 401, body: '' };
       },
       method: 'POST',
     });

src/middlewares/__tests__/retry-test.js

@@ -81,7 +81,7 @@ describe('middlewares/retry', () => {
         response: () => {
           attempt++;
           if (attempt < 3) {
-            return { status: 500 };
+            return { status: 500, body: '' };
           }
           return {
             status: 200,

src/middlewares/batch.js

@@ -184,7 +184,7 @@ async function sendRequests(requestMap: BatchRequestMap, next, opts) {
 
     if (headersOrThunk) {
       const headers = await (isFunction(headersOrThunk)
-        ? headersOrThunk(batchRequest)
+        ? (headersOrThunk: any)(batchRequest)
         : headersOrThunk);
       batchRequest.setFetchOption('headers', headers);
     }

src/middlewares/cache.js

@@ -31,7 +31,7 @@ export default function queryMiddleware(opts?: CacheMiddlewareOpts): Middleware
     if (req.isFormData() && !allowFormData) {
       return next(req);
     }
-    
+
     if (req.cacheConfig && req.cacheConfig.force) {
       return next(req);
     }