Add required ModLoader version to manifest.json

[ithinkandicode]

Suggestion: Add a required setting in _meta.json to set the required version of ModLoader.

Requirements:

• 1 - Add a key to meta.json that specifies the required version of ModLoader.
• 2 - Add support for this to ModLoader: If ModLoader's version is below the required version, don't load the mod.
• 3 - Add a const to ModLoader for its current version, eg const MODLOADER_VERSION = "2.0.0"

Since we're using a semantic version string for the version, we will need a custom compare func to check if the ModLoader version matches or is below the mod's specified version.

If it's below, we can check the major versions based on semantic versioning (major.minor.patch, eg. 2.1.16). For example, a mod that requires ModLoader v2.1.0 should still work in v2.2.0, but won't work in v3.0.0.

[ithinkandicode]

Task 1 was done in #40