Remove deprecated constructors ksql.New() and ksql.NewWithPgx()

It's recommended to use instead one of:

- kpgx.New(ctx, connURL, ksql.Config{})
- kmysql.New(ctx, connURL, ksql.Config{})
- ksqlserver.New(ctx, connURL, ksql.Config{})
- ksqlite3.New(ctx, connURL, ksql.Config{})

ksql.go

@@ -2,13 +2,11 @@ package ksql
 
 import (
 	"context"
-	"database/sql"
 	"fmt"
 	"reflect"
 	"strings"
 	"unicode"
 
-	"github.com/jackc/pgx/v4/pgxpool"
 	"github.com/pkg/errors"
 	"github.com/vingarcia/ksql/kstructs"
 )
@@ -84,57 +82,6 @@ func (c *Config) SetDefaultValues() {
 	}
 }
 
-// New instantiates a new KissSQL client
-func New(
-	dbDriver string,
-	connectionString string,
-	config Config,
-) (DB, error) {
-	config.SetDefaultValues()
-
-	db, err := sql.Open(dbDriver, connectionString)
-	if err != nil {
-		return DB{}, err
-	}
-	if err = db.Ping(); err != nil {
-		return DB{}, err
-	}
-
-	db.SetMaxOpenConns(config.MaxOpenConns)
-
-	return NewWithAdapter(SQLAdapter{db}, dbDriver)
-}
-
-// NewWithPGX instantiates a new ksql client using the pgx
-// library in the backend
-//
-// deprecated: use kpgx.New() instead
-func NewWithPGX(
-	ctx context.Context,
-	connectionString string,
-	config Config,
-) (db DB, err error) {
-	config.SetDefaultValues()
-
-	pgxConf, err := pgxpool.ParseConfig(connectionString)
-	if err != nil {
-		return DB{}, err
-	}
-
-	pgxConf.MaxConns = int32(config.MaxOpenConns)
-
-	pool, err := pgxpool.ConnectConfig(ctx, pgxConf)
-	if err != nil {
-		return DB{}, err
-	}
-	if err = pool.Ping(ctx); err != nil {
-		return DB{}, err
-	}
-
-	db, err = NewWithAdapter(NewPGXAdapter(pool), "postgres")
-	return db, err
-}
-
 // NewWithAdapter allows the user to insert a custom implementation
 // of the DBAdapter interface
 func NewWithAdapter(

ksql_test.go

@@ -679,13 +679,14 @@ func TestInsert(t *testing.T) {
 						return
 					}
 
-					ctx := context.Background()
-
 					// Using columns "id" and "name" as IDs:
 					table := NewTable("users", "id", "name")
 
-					c, err := New(config.driver, connectionString[config.driver], Config{})
-					assert.Equal(t, nil, err)
+					db, closer := connectDB(t, config)
+					defer closer.Close()
+
+					ctx := context.Background()
+					c := newTestDB(db, config.driver)
 
 					u := User{
 						Name: "No ID returned",