upgrade blink, switch to C-n for completion

lua/crentist/lazy/completion.lua

@@ -7,7 +7,7 @@ return {
         { 'L3MON4D3/LuaSnip', version = 'v2.*' }
     },
     -- use a release tag to download pre-built binaries
-    version = 'v1.7.*',
+    version = 'v1.8.*',
 
     ---@module 'blink-cmp'
     ---@type blink.cmp.Config
@@ -35,12 +35,7 @@ return {
             }
         },
         completion = { list = { selection = { preselect = false, auto_insert = true } } },
-        keymap = {
-            preset = 'enter',
-            ['<Tab>'] = { 'select_next', 'snippet_forward', 'fallback' },
-            ['<S-Tab>'] = { 'select_prev', 'snippet_backward', 'fallback' },
-        },
-
+        keymap = { preset = 'enter' },
         appearance = {
             use_nvim_cmp_as_default = true,
             nerd_font_variant = 'mono'