Use generated types for python 38

[predragnikolic]

• Switch from using lsp_types_sublime_text_33.py to using lsp_types.py
• Update the LSP types to match the latest metaModel.schema.json
• These two helper types are now removed, because they are no longer necessary:

CompletionItemDefaults = __CompletionList_itemDefaults_Type_1
CompletionEditRange = __CompletionList_itemDefaults_editRange_Type_1