feat(TypeScript): the source is now fully typed using TS

Author: Rendez

.babelrc

@@ -1,3 +1,3 @@
 {
-  "presets": ["@researchgate/babel-preset"]
+  "presets": ["@researchgate/babel-preset", "@babel/preset-typescript"]
 }

.eslintignore

@@ -1,3 +1,5 @@
 node_modules
 lib
-.docs
+typings
+.docs
+.yarn

.eslintrc.js

@@ -1,2 +1,2 @@
-// Keep this file for editor support
-module.exports = require('@researchgate/spire-config/eslint/react');
+// This file was created by spire-plugin-eslint for editor support
+module.exports = require('@researchgate/spire-config/eslint/react-typescript');

.gitignore

@@ -4,4 +4,7 @@ yarn-error.log
 /lib
 /src/coverage
 /.docs
-.DS_Store
+.DS_Store
+/.vscode
+tsconfig.tsbuildinfo
+typings

.spire/spire-plugin-tslint.js

@@ -0,0 +1,5 @@
+{
+  "rules": {
+    "import/no-extraneous-dependencies": "off"
+  }
+}

docs/docs/components/.eslintrc

@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import Observer from '../../../../src/IntersectionObserver';
+import Observer from '@researchgate/react-intersection-observer';
 
 export default (threshold) => (BaseComponent) => {
     const displayName =

docs/docs/components/HigherOrderComponent/WithIntersectionObserver.js

@@ -1,7 +1,7 @@
 import React from 'react';
 import PropTypes from 'prop-types';
 import { action } from '@storybook/addon-actions';
-import Observer from '../../../../src/IntersectionObserver';
+import Observer from '@researchgate/react-intersection-observer';
 
 const tracked = action('tracked');
 

docs/docs/components/ImpressionTracking/AdImpression.js

@@ -1,6 +1,6 @@
 import React, { Component } from 'react';
 import { decorateAction } from '@storybook/addon-actions';
-import Observer from '../../../../src/IntersectionObserver';
+import Observer from '@researchgate/react-intersection-observer';
 
 const storyBookAction = decorateAction([
     (args) =>

docs/docs/components/OnlyOnce/OnlyOnce.js

@@ -1,7 +1,7 @@
 import React, { Component } from 'react';
 import { decorateAction } from '@storybook/addon-actions';
 import { select } from '@storybook/addon-knobs/react';
-import Observer from '../../../../src/IntersectionObserver';
+import Observer from '@researchgate/react-intersection-observer';
 
 const storyBookAction = decorateAction([
     (args) =>