Duplicate detection limitation

[DiegoTheExplorar]

• Initially we can add 2 people with the same name but different case
• Which is not expected behavior
• So changed comparator for Name class

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Files with missing lines	Coverage Δ	Complexity Δ
src/main/java/seedu/address/model/person/Name.java	92.85% <100.00%> (ø)	6.00 <0.00> (ø)
...rc/main/java/seedu/address/model/person/Phone.java	100.00% <ø> (ø)	7.00 <0.00> (ø)

[RyanWarwick]

lgtm