Make case insensitive

src/main/java/seedu/address/model/person/Address.java

@@ -54,7 +54,7 @@ public boolean equals(Object other) {
         }
 
         Address otherAddress = (Address) other;
-        return value.equals(otherAddress.value);
+        return value.equalsIgnoreCase(otherAddress.value);
     }
 
     @Override

src/main/java/seedu/address/model/person/Email.java

@@ -68,7 +68,7 @@ public boolean equals(Object other) {
         }
 
         Email otherEmail = (Email) other;
-        return value.equals(otherEmail.value);
+        return value.equalsIgnoreCase(otherEmail.value);
     }
 
     @Override

src/main/java/seedu/address/model/person/Name.java

@@ -48,7 +48,7 @@ public boolean equals(Object other) {
         }
 
         Name otherName = (Name) other;
-        return fullName.equals(otherName.fullName);
+        return fullName.equalsIgnoreCase(otherName.fullName);
     }
 
     @Override

src/test/java/seedu/address/model/person/PersonTest.java

@@ -41,9 +41,9 @@ public void isSamePerson() {
         editedAlice = new PersonBuilder(ALICE).withPhone("911").withEmail("[email protected]").build();
         assertFalse(ALICE.isSamePerson(editedAlice));
 
-        // name differs in case, all other attributes same -> returns false
+        // name differs in case, all other attributes same -> returns true
         Person editedBob = new PersonBuilder(BOB).withName(VALID_NAME_BOB.toLowerCase()).build();
-        assertFalse(BOB.isSamePerson(editedBob));
+        assertTrue(BOB.isSamePerson(editedBob));
 
         // name has trailing spaces, all other attributes same -> returns true
         String nameWithTrailingSpaces = VALID_NAME_BOB + " ";