Add TS and flow typings

Author: niekert

index.d.ts

@@ -3,4 +3,4 @@ interface ComponentSize {
   height: number
 }
 
-export default function useComponentSize(): ComponentSize
+export default function useComponentSize<T = any>(ref: React.RefObject<T>): ComponentSize

index.js.flow

@@ -3,4 +3,4 @@ interface ComponentSize {
   height: number,
 }
 
-declare export default function useComponentSize(): ComponentSize;
+declare export default function useComponentSize<T>(ref: React.Ref<T>): ComponentSize;

package.json

@@ -25,6 +25,7 @@
     "react": "^16.7.0-alpha.0"
   },
   "devDependencies": {
+    "@types/react": "^16.4.18",
     "ava": "^0.25.0",
     "browser-env": "^3.2.5",
     "parcel": "^1.10.3",

yarn.lock

@@ -624,6 +624,19 @@
   version "10.12.0"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.12.0.tgz#ea6dcbddbc5b584c83f06c60e82736d8fbb0c235"
 
+"@types/prop-types@*":
+  version "15.5.6"
+  resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.5.6.tgz#9c03d3fed70a8d517c191b7734da2879b50ca26c"
+  integrity sha512-ZBFR7TROLVzCkswA3Fmqq+IIJt62/T7aY/Dmz+QkU7CaW2QFqAitCE8Ups7IzmGhcN1YWMBT4Qcoc07jU9hOJQ==
+
+"@types/react@^16.4.18":
+  version "16.4.18"
+  resolved "https://registry.yarnpkg.com/@types/react/-/react-16.4.18.tgz#2e28a2e7f92d3fa7d6a65f2b73275c3e3138a13d"
+  integrity sha512-eFzJKEg6pdeaukVLVZ8Xb79CTl/ysX+ExmOfAAqcFlCCK5TgFDD9kWR0S18sglQ3EmM8U+80enjUqbfnUyqpdA==
+  dependencies:
+    "@types/prop-types" "*"
+    csstype "^2.2.0"
+
 "@types/semver@^5.5.0":
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/@types/semver/-/semver-5.5.0.tgz#146c2a29ee7d3bae4bf2fcb274636e264c813c45"
@@ -2167,6 +2180,11 @@ [email protected], "cssom@>= 0.3.2 < 0.4.0":
   dependencies:
     cssom "0.3.x"
 
+csstype@^2.2.0:
+  version "2.5.7"
+  resolved "https://registry.yarnpkg.com/csstype/-/csstype-2.5.7.tgz#bf9235d5872141eccfb2d16d82993c6b149179ff"
+  integrity sha512-Nt5VDyOTIIV4/nRFswoCKps1R5CD1hkiyjBE9/thNaNZILLEviVw9yWQw15+O+CpNjQKB/uvdcxFFOrSflY3Yw==
+
 currently-unhandled@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/currently-unhandled/-/currently-unhandled-0.4.1.tgz#988df33feab191ef799a61369dd76c17adf957ea"