Update devDependencies

* @babel/cli                   ^7.14.8  →  ^7.15.5
* @babel/core                  ^7.14.8  →  ^7.15.4
* @babel/preset-env            ^7.14.8  →  ^7.15.6
* @rollup/plugin-commonjs      ^19.0.1  →  ^20.0.0
* @rollup/plugin-node-resolve  ^13.0.2  →  ^13.0.4
* autoprefixer                 ^10.3.1  →  ^10.3.4
* clean-css-cli                 ^5.3.0  →   ^5.3.3
* eslint                       ^7.31.0  →  ^7.32.0
* eslint-config-xo             ^0.37.0  →  ^0.38.0
* eslint-plugin-import         ^2.23.4  →  ^2.24.2
* eslint-plugin-unicorn        ^34.0.1  →  ^36.0.0
* hugo-bin                     ^0.74.0  →  ^0.76.1
* qunit                        ^2.16.0  →  ^2.17.1
* postcss                       ^8.3.5  →   ^8.3.6
* rollup                       ^2.53.3  →  ^2.56.3
* vnu-jar                      21.6.11  →   21.9.2

js/src/dropdown.js

@@ -308,7 +308,7 @@ class Dropdown {
       offset.fn = data => {
         data.offsets = {
           ...data.offsets,
-          ...(this._config.offset(data.offsets, this._element) || {})
+          ...this._config.offset(data.offsets, this._element)
         }
 
         return data

js/src/tooltip.js

@@ -476,7 +476,7 @@ class Tooltip {
       offset.fn = data => {
         data.offsets = {
           ...data.offsets,
-          ...(this.config.offset(data.offsets, this.element) || {})
+          ...this.config.offset(data.offsets, this.element)
         }
 
         return data

js/tests/unit/.eslintrc.json

@@ -27,6 +27,7 @@
     "prefer-arrow-callback": "off",
     "prefer-rest-params": "off",
     "prefer-template": "off",
+    "unicorn/prefer-add-event-listener": "off",
     "unicorn/prefer-spread": "off"
   }
 }