Updated Changelog for v0.1.0 release

[TheCedarPrince]

[0.1.0] - August 8th, 2022

Huge update with new documentation, initial tests, and improved docstrings

Added

• Deployed documentation to github pages
• Updated README with badges and documentation source
• Helper utilities across the package in src/helpers.jl
• Tests for helpers
• Started tests for getters
• Todo bot for creating linkable issues
• Project.toml
  • Added Dates dependency
  • Added TimeZones dependency
  • Added TimeZones dependency
  • Updated compat entries

Changed

• Fixed GetPatientAgeGroup to get age according to three different methods

Fixed

• Removed type definitions as that was causing premature issues
• Determined alternative method to find current date/year based on OMOP CDM v5.4