Update esqlite reference and fix a broken test. (#57)

Author: scouten

mix.exs

@@ -26,7 +26,7 @@ defmodule Sqlitex.Mixfile do
   # Type `mix help deps` for more examples and options
   defp deps do
     [
-      {:esqlite, "~> 0.2.0"},
+      {:esqlite, "~> 0.2.3"},
       {:decimal, "~> 1.1"},
 
       {:credo, "~> 0.4", only: :dev},

test/server/statement_cache_test.exs

@@ -11,19 +11,19 @@ defmodule Sqlitex.Server.StatementCacheTest do
     assert %S{cached_stmts: %{}, db: _, limit: 3, lru: [], size: 0} = cache
 
     {cache, stmt1a} = S.prepare(cache, "SELECT 42")
-    assert %Stmt{column_names: [:"42"], column_types: [nil], statement: ""} = stmt1a
+    assert %Stmt{column_names: [:"42"], column_types: [nil]} = stmt1a
 
     {cache, stmt2a} = S.prepare(cache, "SELECT 43")
-    assert %Stmt{column_names: [:"43"], column_types: [nil], statement: ""} = stmt2a
+    assert %Stmt{column_names: [:"43"], column_types: [nil]} = stmt2a
 
     {cache, stmt3} = S.prepare(cache, "SELECT 44")
-    assert %Stmt{column_names: [:"44"], column_types: [nil], statement: ""} = stmt3
+    assert %Stmt{column_names: [:"44"], column_types: [nil]} = stmt3
 
     {cache, stmt1b} = S.prepare(cache, "SELECT 42")
     assert stmt1a == stmt1b # shouldn't have been purged
 
     {cache, stmt4} = S.prepare(cache, "SELECT 353")
-    assert %Stmt{column_names: [:"353"], column_types: [nil], statement: ""} = stmt4
+    assert %Stmt{column_names: [:"353"], column_types: [nil]} = stmt4
 
     {_cache, stmt2b} = S.prepare(cache, "SELECT 42")
     refute stmt2a == stmt2b # should have been purged