Do not escape the upper case names

[kracekumar]

Description

• Previously when the table was upper case, the escaped name had a back tick.
• Now it skips by modifying the regex to mathc the pattern
• screenshot

• Fixes Autocompleting tables and columns that are all caps should not add backticks #185

Checklist

• I've added this contribution to the CHANGELOG.md file.

[kracekumar]

Previous tests were escaping the upper case column name and not sure why though. If there is a solid case, we can close this PR. I don't see any issue of passing upper case as is to sqlite3.

sqlite> .open :memory;
sqlite> create table TEST(ID int);
sqlite> insert into TEST(1);
Parse error: near "1": syntax error
  insert into TEST(1);
                   ^--- error here
sqlite> insert into TEST values(1);
sqlite> select ID from TEST;
1
sqlite>

[amjith]

I believe the escaping was borrowed from pgcli (or mycli). I think Postgres treats quoted names case sensitive and lower cases them of they are not quoted.