feat: use lodash merge for deep merging

Author: patrickxchong

.eleventy.js

@@ -1,4 +1,5 @@
 const SVGSprite = require("./src/SVGSprite");
+const lodash = require('lodash'); 
 
 let idCounter = 0;
 
@@ -15,7 +16,11 @@ module.exports = (eleventyConfig, pluginConfig = [{}]) => {
     }
 
     let defaultOptions = require("./src/options");
-    let config = Object.assign(defaultOptions, options);
+    let config = lodash.merge(defaultOptions, options);
+
+    // Debug statement to log config after merge
+    // const util = require('util')
+    // console.log(util.inspect(config, {showHidden: false, depth: null, colors: true}))
 
     if (svgSpriteShortcodeList.includes(config.svgSpriteShortcode)) {
       throw new Error("[eleventy-plugin-svg-sprite] illegal to have duplicate svgSpriteShortcode in config list");

package.json

@@ -29,6 +29,7 @@
     "@11ty/eleventy": ">=0.5.4"
   },
   "dependencies": {
+    "lodash": "^4.17.21",
     "svg-sprite": "2.0.0"
   }
 }

yarn.lock

@@ -428,6 +428,11 @@ lodash.trimstart@^4.5.1:
   resolved "https://registry.yarnpkg.com/lodash.trimstart/-/lodash.trimstart-4.5.1.tgz#8ff4dec532d82486af59573c39445914e944a7f1"
   integrity sha512-b/+D6La8tU76L/61/aN0jULWHkT0EeJCmVstPBn/K9MtD2qBW83AsBNrr63dKuWYwVMO7ucv13QNO/Ek/2RKaQ==
 
+lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+
 logform@^2.3.2, logform@^2.4.0:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/logform/-/logform-2.4.2.tgz#a617983ac0334d0c3b942c34945380062795b47c"