Names should accept apostrophes

[valhrd]

Names now also no longer accept backslashes Relevant test cases added in NameTest.java

[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% <ø> (ø)	6.00 <0.00> (ø)