Updating js plugins

public/plugins/dropzone/test/.gitignore

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+test-prebuilt.js

public/plugins/dropzone/test/karma.conf.js

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+module.exports = function (config) {
+  config.set({
+    frameworks: ["mocha", "sinon-chai"],
+    // files: ["test/**/*.js"],
+    files: ["test.js"],
+    preprocessors: {
+      "test.js": ["rollup"],
+    },
+    rollupPreprocessor: {
+      /**
+       * This is just a normal Rollup config object,
+       * except that `input` is handled for you.
+       */
+      plugins: [require("rollup-plugin-html")()],
+      output: {
+        // format: 'iife', // Helps prevent naming collisions.
+        // name: '<your_project>', // Required for 'iife' format.
+        // sourcemap: 'inline', // Sensible for testing.
+      },
+    },
+
+    reporters: ["spec"],
+    specReporter: {
+      maxLogLines: 5, // limit number of lines logged per test
+      suppressErrorSummary: false, // do not print error summary
+      suppressFailed: false, // do not print information about failed tests
+      suppressPassed: false, // do not print information about passed tests
+      suppressSkipped: true, // do not print information about skipped tests
+      showSpecTiming: false, // print the time elapsed for each spec
+      failFast: true, // test would finish with error when a first fail occurs.
+    },
+
+    port: 9876, // karma web server port
+    colors: true,
+    logLevel: config.LOG_INFO,
+    browsers: ["ChromeHeadless"],
+    autoWatch: false,
+    // singleRun: false, // Karma captures browsers, runs the tests and exits
+    concurrency: Infinity,
+  });
+};