Incorrect default for glob copy `options.overwrite`

[pettinen]

When copying, options.overwrite should default to true, as documented

filemanager-webpack-plugin/src/options-schema.ts

Lines 38 to 42 in 07b9779

	overwrite: {
	description: 'overwrite existing file or directory',
	type: 'boolean',
	default: true,
	},

However when the copy source is a glob and overwrite is not specified, fsExtra.copy is called with { overwrite: undefined }, which fs-extra interprets as { overwrite: false }:

filemanager-webpack-plugin/src/utils/glob-copy.ts

Lines 55 to 58 in 07b9779

	const copyOptions = {
	overwrite: mergedOptions.overwrite,
	preserveTimestamps: mergedOptions.preserveTimestamps,
	};

This is also an undocumented breaking change between v8.0.0 and v9.0.0.