Revert flymake dependency due to 25.1 breakage

Fixes #1225

Author: yyoncho

README.org

@@ -53,7 +53,7 @@
    Client for [[https://github.com/Microsoft/language-server-protocol/][Language Server Protocol]] (v3.14). [[https://github.com/emacs-lsp/lsp-mode][lsp-mode]] aims to provide IDE-like experience by providing optional integration with the most popular Emacs packages like ~company~, ~flycheck~ and ~projectile~.
 
    - Non-blocking asynchronous calls
-   - Real-time Diagnostics/linting (via builtin ~flymake~ when Emacs > 26 or [[https://github.com/flycheck/flycheck][flycheck]]/[[https://github.com/emacs-lsp/lsp-ui][lsp-ui]])
+   - Real-time Diagnostics/linting (via builtin ~flymake~ when Emacs > 26, requires flymake>=1.0.5 or [[https://github.com/flycheck/flycheck][flycheck]]/[[https://github.com/emacs-lsp/lsp-ui][lsp-ui]])
    - Code completion - using [[https://github.com/tigersoldier/company-lsp][company-lsp]] or builtin ~completion-at-point~
    - Hovers - using [[https://github.com/emacs-lsp/lsp-ui][lsp-ui]]
    - Code actions - using ~lsp-execute-code-action~ or [[https://github.com/emacs-lsp/lsp-ui][lsp-ui]]

lsp-mode.el

@@ -4,8 +4,8 @@
 
 ;; Author: Vibhav Pant, Fangrui Song, Ivan Yonchovski
 ;; Keywords: languages
-;; Package-Requires: ((emacs "25.1") (dash "2.14.1") (dash-functional "2.14.1") (f "0.20.0") (ht "2.0") (spinner "1.7.3") (markdown-mode "2.3") (lv "0") (flymake "1.0.5"))
-;; Version: 6.3-snapshot
+;; Package-Requires: ((emacs "25.1") (dash "2.14.1") (dash-functional "2.14.1") (f "0.20.0") (ht "2.0") (spinner "1.7.3") (markdown-mode "2.3") (lv "0"))
+;; Version: 6.2.1
 
 ;; URL: https://github.com/emacs-lsp/lsp-mode
 ;; This program is free software; you can redistribute it and/or modify