refactor(api)!: rename Dictionary => Dict

In the api_info() output:

    :new|put =map(filter(api_info().functions, '!has_key(v:val,''deprecated_since'')'), 'v:val')
    ...

    {'return_type': 'ArrayOf(Integer, 2)', 'name': 'nvim_win_get_position', 'method': v:true, 'parameters': [['Window', 'window']], 'since': 1}

The `ArrayOf(Integer, 2)` return type didn't break clients when we added
it, which is evidence that clients don't use the `return_type` field,
thus renaming Dictionary => Dict in api_info() is not (in practice)
a breaking change.

1 files changed, 2 insertions, 2 deletions

diff --git a/test/functional/vimscript/map_functions_spec.lua b/test/functional/vimscript/map_functions_spec.lua
index 44be5b3185..b69b7dbd57 100644
--- a/test/functional/vimscript/map_functions_spec.lua
+++ b/test/functional/vimscript/map_functions_spec.lua
@@ -36,7 +36,7 @@ describe('maparg()', function()
     lnum = 0,
   }
 
-  it('returns a dictionary', function()
+  it('returns a dict', function()
     command('nnoremap foo bar')
     eq('bar', fn.maparg('foo'))
     eq(foo_bar_map_table, fn.maparg('foo', 'n', false, true))
@@ -54,7 +54,7 @@ describe('maparg()', function()
     eq('', fn.maparg('not a mapping'))
   end)
 
-  it('returns an empty dictionary when no map is present and dict is requested', function()
+  it('returns an empty dict when no map is present and dict is requested', function()
     eq({}, fn.maparg('not a mapping', 'n', false, true))
   end)