docs: fix JSDoc field for object parameter templateParams in Generato…

…r constructor (#999)

lib/generator.js

@@ -77,7 +77,7 @@ class Generator {
    * @param {String} templateName  Name of the template to generate.
    * @param {String} targetDir     Path to the directory where the files will be generated.
    * @param {Object} options
-   * @param {String} [options.templateParams]   Optional parameters to pass to the template. Each template define their own params.
+   * @param {Object<string, string>} [options.templateParams]   Optional parameters to pass to the template. Each template define their own params.
    * @param {String} [options.entrypoint]       Name of the file to use as the entry point for the rendering process. Use in case you want to use only a specific template file. Note: this potentially avoids rendering every file in the template.
    * @param {String[]} [options.noOverwriteGlobs] List of globs to skip when regenerating the template.
    * @param {Object<String, Boolean | String | String[]>} [options.disabledHooks] Object with hooks to disable. The key is a hook type. If key has "true" value, then the generator skips all hooks from the given type. If the value associated with a key is a string with the name of a single hook, then the generator skips only this single hook name. If the value associated with a key is an array of strings, then the generator skips only hooks from the array.