chore(dev): update major devDep versions

Remove power-assert, it's just not worth it now that
it's this old

.babelrc.js

@@ -15,12 +15,5 @@ module.exports = {
     "@babel/plugin-transform-flow-comments",
     "@babel/plugin-proposal-class-properties",
     "transform-inline-environment-variables"
-  ],
-  "env": {
-    "test": {
-      "plugins": [
-        "espower"
-      ]
-    }
-  }
+  ]
 }

.flowconfig

@@ -1,4 +1,5 @@
 [ignore]
+<PROJECT_ROOT>/node_modules/webpack-cli.*
 
 [include]
 lib/
@@ -12,3 +13,4 @@ suppress_comment=\\(.\\|\n\\)*\\s*\\$FlowNewLine.*
 suppress_comment=\\(.\\|\n\\)*\\s*\\$FlowIssue
 esproposal.class_instance_fields=enable
 esproposal.class_static_fields=enable
+sharedmemory.heap_size=3221225472

Makefile

@@ -22,7 +22,7 @@ build-cjs: $(BIN)
 	$(BIN)/babel --out-dir ./build/cjs ./lib
 
 build-web: $(BIN)
-	$(BIN)/webpack --mode=production --display-modules
+	$(BIN)/webpack --mode=production
 
 # Allows usage of `make install`, `make link`
 install link:
@@ -54,13 +54,13 @@ define release
 	git tag "v$$NEXT_VERSION" -m "release v$$NEXT_VERSION"
 endef
 
-release-patch: test 
+release-patch: test
 	@$(call release,patch)
 
-release-minor: test 
+release-minor: test
 	@$(call release,minor)
 
-release-major: test 
+release-major: test
 	@$(call release,major)
 
 publish: build

karma.conf.js

@@ -1,15 +1,37 @@
 'use strict';
 
 const _ = require('lodash');
+const webpack = require('webpack');
 process.env.NODE_ENV = 'test';
 process.env.CHROME_BIN = require('puppeteer').executablePath();
 
 module.exports = function(config) {
+  const webpackConfig = _.merge(
+    require('./webpack.config.js')({}, {}),
+    {
+      mode: 'production',
+      // Remove source maps: *speeeeeed*
+      devtool: false,
+      cache: true,
+      performance: {
+        hints: false,
+      },
+      // zero out externals; we want to bundle React
+      externals: '',
+    }
+  );
+
+  delete webpackConfig.entry; // karma-webpack complains
+  delete webpackConfig.output; // karma-webpack complains
+  webpackConfig.plugins.push(new webpack.DefinePlugin({
+    process: {env: {}},
+  }));
+
   config.set({
 
     basePath: '',
 
-    frameworks: [ 'jasmine'],
+    frameworks: ['webpack', 'jasmine'],
 
     files: [
       'specs/draggable.spec.jsx'
@@ -22,24 +44,7 @@ module.exports = function(config) {
       'specs/draggable.spec.jsx': ['webpack']
     },
 
-    webpack: _.merge(
-      require('./webpack.config.js')({}, {}),
-      {
-        mode: 'production',
-        // Remove source maps: *speeeeeed*
-        devtool: 'none',
-        cache: true,
-        module: {
-          // Suppress power-assert warning
-          exprContextCritical: false,
-        },
-        performance: {
-          hints: false,
-        },
-        // zero out externals; we want to bundle React
-        externals: '',
-      }
-    ),
+    webpack: webpackConfig,
 
     webpackServer: {
       stats: {

package.json

@@ -47,27 +47,27 @@
     "@babel/preset-react": "^7.9.4",
     "@types/react": "^16.9.35",
     "@types/react-dom": "^16.9.8",
+    "assert": "^2.0.0",
     "babel-eslint": "^10.1.0",
     "babel-loader": "^8.1.0",
-    "babel-plugin-espower": "^3.0.1",
     "babel-plugin-transform-inline-environment-variables": "^0.4.3",
     "eslint": "^7.0.0",
     "eslint-plugin-react": "^7.20.0",
     "flow-bin": "^0.125.1",
     "jasmine-core": "^3.5.0",
-    "karma": "^5.0.9",
+    "karma": "^6.1.1",
     "karma-chrome-launcher": "^3.1.0",
     "karma-cli": "2.0.0",
-    "karma-firefox-launcher": "^1.3.0",
+    "karma-firefox-launcher": "^2.1.0",
     "karma-ie-launcher": "^1.0.0",
-    "karma-jasmine": "^3.1.1",
+    "karma-jasmine": "^4.0.1",
     "karma-phantomjs-launcher": "^1.0.4",
     "karma-phantomjs-shim": "^1.5.0",
-    "karma-webpack": "^4.0.2",
+    "karma-webpack": "^5.0.0",
     "lodash": "^4.17.4",
     "phantomjs-prebuilt": "^2.1.16",
-    "power-assert": "^1.4.4",
     "pre-commit": "^1.2.2",
+    "process": "^0.11.10",
     "puppeteer": "^3.1.0",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
@@ -76,8 +76,8 @@
     "semver": "^7.3.2",
     "static-server": "^3.0.0",
     "typescript": "^3.9.3",
-    "webpack": "^4.43.0",
-    "webpack-cli": "^3.3.11",
+    "webpack": "^5.24.3",
+    "webpack-cli": "^4.5.0",
     "webpack-dev-server": "^3.11.0"
   },
   "resolutions": {

specs/draggable.spec.jsx

@@ -5,7 +5,7 @@ import TestUtils from 'react-dom/test-utils';
 import ShallowRenderer from 'react-test-renderer/shallow';
 import Draggable, {DraggableCore} from '../lib/Draggable';
 import FrameComponent from 'react-frame-component';
-import assert from 'power-assert';
+import assert from 'assert';
 import _ from 'lodash';
 import {getPrefix, browserPrefixToKey, browserPrefixToStyle} from '../lib/utils/getPrefix';
 const transformStyle = browserPrefixToStyle('transform', getPrefix('transform'));
@@ -143,7 +143,7 @@ describe('react-draggable', function () {
         assert(data.deltaY === 200);
       }
       drag = TestUtils.renderIntoDocument(
-        <Draggable 
+        <Draggable
           scale={0.5}
           onDrag={onDrag}>
           <div />