Regenerate package-lock.json

Also, fixed the jest tests by locking the version of `cheerio`
cheeriojs/cheerio#2547 (comment)

.babelrc

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

jest.config.js

@@ -1,16 +1,18 @@
 module.exports = {
-    'rootDir': 'src',
-    'testEnvironment': 'jsdom',
-    "moduleFileExtensions": [
-      "js",
-      "jsx"
+    rootDir: 'src',
+    moduleFileExtensions: [
+        'js',
+        'jsx'
     ],
-    "moduleDirectories": [
-      "node_modules",
-      "src"
+    moduleDirectories: [
+        'node_modules',
+        'src'
     ],
-    "moduleNameMapper": {
-      "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__mocks__/fileMock.js",
-      "\\.(css|less|scss)$": "<rootDir>/__mocks__/styleMock.js"
-    }
+    moduleNameMapper: {
+        '\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$': '<rootDir>/__mocks__/fileMock.js',
+        '\\.(css|less|scss)$': '<rootDir>/__mocks__/styleMock.js'
+    },
+    testEnvironment: 'jsdom',
+    testPathIgnorePatterns: ['node_modules/'],
+    testMatch: ['src/tests/*.test.js'],
 };