Rewrite keymap.lua (#452)

* Move feedkeys related codes to `cmp.utils.feedkeys`

* Improve mapping handling

* Fix test

* fmt

lua/cmp/utils/feedkeys_spec.lua

@@ -0,0 +1,23 @@
+local spec = require('cmp.utils.spec')
+local keymap = require('cmp.utils.keymap')
+
+local feedkeys = require('cmp.utils.feedkeys')
+
+describe('feedkeys', function()
+  before_each(spec.before)
+
+  it('dot-repeat', function()
+    feedkeys.call(keymap.t('iaiueo<Esc>'), 'nx')
+    assert.are.equal(vim.fn.getreg('.'), keymap.t('aiueo'))
+  end)
+  it('macro', function()
+    vim.fn.setreg('q', '')
+    vim.cmd([[normal! qq]])
+    feedkeys.call(keymap.t('iaiueo'), 'nt')
+    feedkeys.call(keymap.t('<Esc>'), 'nt', function()
+      vim.cmd([[normal! q]])
+      assert.are.equal(vim.fn.getreg('q'), keymap.t('iaiueo<Esc>'))
+      print(vim.fn.getreg('q'))
+    end)
+  end)
+end)