Add an optional peer dependency to react-apollo

Changelog.md

@@ -17,6 +17,8 @@
   [@hwillson](https://github.com/hwillson) in [#3334](https://github.com/apollographql/react-apollo/pull/3334)
 - Export `MockedProviderProps` and `MockedProviderState` from `@apollo/react-testing`. <br/>
   [@hwillson](https://github.com/hwillson) in [#3337](https://github.com/apollographql/react-apollo/pull/3337)
+- Add `@types/react` as a peer dep, to address potential TS compilation errors when using `ApolloProvider`. <br/>
+  [@zkochan](https://github.com/zkochan) in [#3278](https://github.com/apollographql/react-apollo/pull/3278)
 
 ## 3.0.0 (2019-08-06)
 

packages/all/package.json

@@ -33,6 +33,7 @@
     "deploy": "npm publish"
   },
   "peerDependencies": {
+    "@types/react": "^16.8.0",
     "apollo-client": "^2.6.4",
     "graphql": "^14.3.1",
     "react": "^16.8.0",

packages/common/package.json

@@ -32,6 +32,7 @@
     "test:umd": "npm run build && npx jest --config ../../config/jest.umd.config.js --testPathPattern packages/common"
   },
   "peerDependencies": {
+    "@types/react": "^16.8.0",
     "apollo-client": "^2.6.4",
     "apollo-utilities": "^1.3.2",
     "graphql": "^14.3.1",

packages/components/package.json

@@ -36,6 +36,7 @@
     "test:umd": "npm run build && npx jest --config ../../config/jest.umd.config.js --testPathPattern packages/components"
   },
   "peerDependencies": {
+    "@types/react": "^16.8.0",
     "apollo-cache": "^1.3.2",
     "apollo-client": "^2.6.4",
     "apollo-link": "^1.2.12",

packages/hoc/package.json

@@ -36,6 +36,7 @@
     "test:umd": "npm run build && npx jest --config ../../config/jest.umd.config.js --testPathPattern packages/hoc"
   },
   "peerDependencies": {
+    "@types/react": "^16.8.0",
     "apollo-client": "^2.6.4",
     "graphql": "^14.3.1",
     "react": "^16.8.0",

packages/hooks/package.json

@@ -36,6 +36,7 @@
     "test:umd": "npm run build && npx jest --config ../../config/jest.umd.config.js --testPathPattern packages/hooks"
   },
   "peerDependencies": {
+    "@types/react": "^16.8.0",
     "apollo-client": "^2.6.4",
     "graphql": "^14.3.1",
     "react": "^16.8.0",