Temporary registers, SSH Port, Bug Fixes (#251)

- allows SSH Gitlab connection to have custom port
- introduces temporary registers
- fixes issue w/ quitting the popup on MR creation

This is a #MINOR release

README.md

@@ -127,6 +127,7 @@ require("gitlab").setup({
     pipeline = nil,
     reply = nil,
     squash_message = nil,
+    temp_registers = {}, -- List of registers for backing up popup content (see `:h gitlab.nvim.temp-registers`)
   },
   discussion_tree = { -- The discussion tree that holds all comments
     auto_open = true, -- Automatically open when the reviewer is opened
@@ -169,8 +170,12 @@ require("gitlab").setup({
       "conflicts",
       "assignees",
       "reviewers",
-      "branch",
       "pipeline",
+      "branch",
+      "target_branch",
+      "delete_branch",
+      "squash",
+      "labels",
     },
   },
   discussion_signs = {
@@ -195,13 +200,11 @@ require("gitlab").setup({
     success = "✓",
     failed = "",
   },
-  merge = { -- The default behaviors when merging an MR, see "Merging an MR"
-    squash = false,
-    delete_branch = false,
-  },
   create_mr = {
     target = nil, -- Default branch to target when creating an MR
     template_file = nil, -- Default MR template in .gitlab/merge_request_templates
+    delete_branch = false, -- Whether the source branch will be marked for deletion
+    squash = false, -- Whether the commits will be marked for squashing
     title_input = { -- Default settings for MR title input window
       width = 40,
       border = "rounded",