follow sqlite new release (#40)

* refactor(sql_wrapper): follow sqlite new release

* update readme

README.md

@@ -59,11 +59,11 @@ If the active buffer (prior to the finder being launched) is attached to an LSP
 ## Requirements
 
 - [telescope.nvim](https://github.com/nvim-telescope/telescope.nvim) (required)
-- [sql.nvim](https://github.com/tami5/sql.nvim) (required)
+- [sqlite.lua](https://github.com/tami5/sqlite.lua) (required)
 - [nvim-web-devicons](https://github.com/kyazdani42/nvim-web-devicons) (optional)
 
 Timestamps and file records are stored in an [SQLite3](https://www.sqlite.org/index.html) database for persistence and speed.
-This plugin uses `sql.nvim` to perform the database transactions.
+This plugin uses `sqlite.lua` to perform the database transactions.
 
 ## Installation
 
@@ -75,7 +75,7 @@ use {
   config = function()
     require"telescope".load_extension("frecency")
   end,
-  requires = {"tami5/sql.nvim"}
+  requires = {"tami5/sqlite.lua"}
 }
 ```
 

lua/telescope/_extensions/frecency/sql_wrapper.lua

@@ -1,9 +1,9 @@
 local util    = require("telescope._extensions.frecency.util")
 local vim     = vim
 
-local has_sql, sql = pcall(require, "sql")
-if not has_sql then
-  error("This plugin requires sql.nvim (https://github.com/tami5/sql.nvim)")
+local has_sqlite, sqlite = pcall(require, "sqlite")
+if not has_sqlite then
+  error("This plugin requires sqlite.lua (https://github.com/tami5/sqlite.lua) " .. tostring(sqlite))
 end
 
 -- TODO: pass in max_timestamps from db.lua
@@ -43,7 +43,7 @@ function M:bootstrap(db_root)
   -- create the db if it doesn't exist
   db_root = db_root or vim.fn.stdpath('data')
   local db_filename = db_root .. "/file_frecency.sqlite3"
-  self.db = sql:open(db_filename)
+  self.db = sqlite:open(db_filename)
   if not self.db then
     print("error")
     return