fix: load all eagerly loaded files and folders

[renanccastro]

Load all eagerly loaded files and folders

Problem

Previously, the linter was only checking files within the server folder, which could miss eagerly loaded files and folders outside of this directory. This led to incomplete linting coverage for Meteor projects not using main modules.

Solution

This PR modifies the Walker class to start from the root app directory instead of specifically the server folder. This change ensures that all eagerly loaded files and folders are included in the linting process, regardless of their location in the project structure.

Changes

• Updated lib/util/walker.js to start walking from the app root directory
• Removed the check for the existence of the server folder
• Updated CHANGELOG.md to reflect the bug fix in versions 1.5.1 and 1.5.2
• Bumped package version to 1.5.2 in package.json