message: feat: disabled when coc-python activated
diff: -import { commands, ExtensionContext, LanguageClient, LanguageClientOptions, languages, NodeModule, services, TransportKind, workspace } from 'coc.nvim';
  +import { commands, ExtensionContext, extensions, LanguageClient, LanguageClientOptions, languages, NodeModule, services, TransportKind, workspace } from 'coc.nvim';
  import { existsSync } from 'fs';
  import { lt } from 'semver';
  import { DocumentSelector, TextEdit, WorkspaceEdit } from 'vscode-languageserver-protocol';
  @@ -8,6 +8,11 @@ import { LinterProvider } from './linterProvider';
  const documentSelector: DocumentSelector = [{ scheme: 'file', language: 'python' }];
  export async function activate(context: ExtensionContext): Promise<void> {
  + const state = extensions.getExtensionState('coc-python');
  + if (state.toString() === 'activated') {
  + workspace.showMessage(`coc-python is installed and activated, coc-pyright will be disabled`, 'warning');
  + return;
  + }
  if (lt(process.versions.node, '12.0.0')) {
  workspace.showMessage(`Pyright needs Node.js v12+ to work, your Node.js is ${process.version}.`, 'error');
  return;
  