Update readme.md for 1.4.0
Update readme.md for 1.4.0

gregg-miskelly/omnisharp-vscode,seraku24/omnisharp-vscode,OmniSharp/omnisharp-vscode,gregg-miskelly/omnisharp-vscode,OmniSharp/omnisharp-vscode,OmniSharp/omnisharp-vscode,OmniSharp/omnisharp-vscode,gregg-miskelly/omnisharp-vscode,gregg-miskelly/omnisharp-vscode,seraku24/omnisharp-vscode,OmniSharp/omnisharp-vscode