Rename Boolean (object) type annotations to boolean (primitive).

src/isEmptyObject.ts

@@ -1,4 +1,4 @@
-export default function isEmptyObject(obj: Object): Boolean {
+export default function isEmptyObject(obj: Object): boolean {
   if (!obj) {
     return true;
   }

src/mergeDeep.ts

@@ -16,6 +16,6 @@ export default function mergeDeep(target: any, source: any): any {
   return output;
 }
 
-function isObject(item: any): Boolean {
+function isObject(item: any): boolean {
   return item && typeof item === 'object' && !Array.isArray(item);
 }

src/stitching/schemaRecreation.ts

@@ -33,7 +33,7 @@ import defaultMergedResolver from './defaultMergedResolver';
 export function recreateType(
   type: GraphQLNamedType,
   resolveType: ResolveType<any>,
-  keepResolvers: Boolean,
+  keepResolvers: boolean,
 ): GraphQLNamedType {
   if (type instanceof GraphQLObjectType) {
     const fields = type.getFields();
@@ -148,7 +148,7 @@ function parseLiteral(ast: ValueNode): any {
 export function fieldMapToFieldConfigMap(
   fields: GraphQLFieldMap<any, any>,
   resolveType: ResolveType<any>,
-  keepResolvers: Boolean,
+  keepResolvers: boolean,
 ): GraphQLFieldConfigMap<any, any> {
   const result: GraphQLFieldConfigMap<any, any> = {};
   Object.keys(fields).forEach(name => {
@@ -195,7 +195,7 @@ export function createResolveType(
 export function fieldToFieldConfig(
   field: GraphQLField<any, any>,
   resolveType: ResolveType<any>,
-  keepResolvers: Boolean,
+  keepResolvers: boolean,
 ): GraphQLFieldConfig<any, any> {
   return {
     type: resolveType(field.type),

src/transforms/FilterRootFields.ts

@@ -6,7 +6,7 @@ export type RootFilter = (
   operation: 'Query' | 'Mutation' | 'Subscription',
   fieldName: string,
   field: GraphQLField<any, any>,
-) => Boolean;
+) => boolean;
 
 export default class FilterRootFields implements Transform {
   private transformer: TransformRootFields;

src/transforms/FilterToSchema.ts

@@ -65,8 +65,7 @@ function filterDocumentToSchema(
   const validFragments: Array<FragmentDefinitionNode> = fragments.filter(
     (fragment: FragmentDefinitionNode) => {
       const typeName = fragment.typeCondition.name.value;
-      const type = targetSchema.getType(typeName);
-      return Boolean(type);
+      return Boolean(targetSchema.getType(typeName));
     },
   );
 
@@ -268,7 +267,7 @@ function resolveType(type: GraphQLType): GraphQLNamedType {
 }
 
 function union(...arrays: Array<Array<string>>): Array<string> {
-  const cache: { [key: string]: Boolean } = {};
+  const cache: { [key: string]: boolean } = {};
   const result: Array<string> = [];
   arrays.forEach(array => {
     array.forEach(item => {

src/transforms/FilterTypes.ts

@@ -5,9 +5,9 @@ import { Transform } from '../transforms/transforms';
 import { visitSchema, VisitSchemaKind } from '../transforms/visitSchema';
 
 export default class FilterTypes implements Transform {
-  private filter: (type: GraphQLNamedType) => Boolean;
+  private filter: (type: GraphQLNamedType) => boolean;
 
-  constructor(filter: (type: GraphQLNamedType) => Boolean) {
+  constructor(filter: (type: GraphQLNamedType) => boolean) {
     this.filter = filter;
   }
 

src/transforms/visitSchema.ts

@@ -38,7 +38,7 @@ export type TypeVisitor = (
 export function visitSchema(
   schema: GraphQLSchema,
   visitor: SchemaVisitor,
-  stripResolvers?: Boolean,
+  stripResolvers?: boolean,
 ) {
   const types = {};
   const resolveType = createResolveType(name => {