Added configuration files

Author: Bubblesphere

package.json

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+{
+  "name": "bit-array",
+  "description": "Bit array implementation in javascript",
+  "version": "0.1.0",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/Bubblesphere/bit-array.git"
+  },
+  "keywords": [
+    "bit",
+    "array",
+    "typescript",
+    "javascript"
+  ],
+  "author": "Déric Dallaire",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/Bubblesphere/bit-array/issues"
+  },
+  "homepage": "https://github.com/Bubblesphere/bit-array",
+  "devDependencies": {
+    "babel-preset-es2015": "^6.24.1",
+    "clean-webpack-plugin": "^0.1.19",
+    "copy-webpack-plugin": "^4.5.1",
+    "ts-loader": "^4.1.0",
+    "typescript": "^2.7.2",
+    "webpack": "^4.1.1",
+    "webpack-bundle-analyzer": "^2.11.1",
+    "webpack-cli": "^2.0.12",
+    "webpack-dev-server": "^3.1.1",
+    "webpack-merge": "^4.1.2"
+  },
+  "scripts": {
+    "start": "webpack-dev-server --open-page dev/index.html --config webpack.dev.js --mode development ",
+    "build": "webpack --config webpack.prod.js --mode production"
+  }
+}

tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "esnext",
+        "noImplicitAny": true,
+        "removeComments": true,
+        "preserveConstEnums": true,
+        "sourceMap": true,
+        "target": "es5"
+    },
+    "include": [
+        "src/**/*"
+    ],
+    "exclude": [
+        "node_modules",
+        "**/*.test.ts"
+    ]
+}

webpack.common.js

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+var path = require("path");
+const webpack = require('webpack');
+const CleanWebpackPlugin = require('clean-webpack-plugin');
+const CopyWebpackPlugin = require('copy-webpack-plugin');
+
+module.exports = {
+  target: 'web',
+  resolve: {
+    extensions: ['.ts', '.tsx', '.js']
+  },
+  entry: {
+    index: "./src/demo/index.ts"
+  },
+  output: {
+    filename: "[name]-bundle.js",
+    path: path.resolve(__dirname, "dev"),
+    publicPath: "/dev/"
+  },
+  // Demos use the same library, bundle the code in common into a diff file
+  optimization: {
+    splitChunks: {
+      chunks: "all",
+      minSize: 1000,
+      name: "common"
+    }
+  },
+  plugins: [
+    new CopyWebpackPlugin([{ 
+      from: 'src/demo/*.html',
+      flatten: true
+    }])
+  ],
+  module: {
+    rules: [
+      { 
+        test: /\.tsx?$/, 
+        loader: "ts-loader", 
+      }
+    ]
+  }
+};

webpack.dev.js

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+const merge = require('webpack-merge');
+const common = require('./webpack.common.js');
+
+module.exports = merge(common, {
+  devtool: 'inline-source-map',
+  devServer: {
+    stats: {
+      assets: false,
+      hash: false,
+      chunks: false,
+      errors: true,
+      errorDetails: true,
+    },
+    overlay: true,
+  }
+});

webpack.prod.js

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+const merge = require('webpack-merge');
+const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
+const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
+const common = require('./webpack.common.js');
+
+
+module.exports = merge(common, {
+  // remove comment to get source map in production
+  //devtool: 'source-map',
+  plugins: [
+    new BundleAnalyzerPlugin(),
+    new UglifyJSPlugin({
+      // remove comment to get source map in production
+      //sourceMap: true
+    })
+  ]
+});