Update cheatsheets

task

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# task
+
+> Command-line to-do list manager.
+> More information: <https://taskwarrior.org/docs/>.
+
+- Add a new task which is due tomorrow:
+
+`task add {{description}} due:{{tomorrow}}`
+
+- Update a task's priority:
+
+`task {{task_id}} modify priority:{{H|M|L}}`
+
+- Complete a task:
+
+`task {{task_id}} done`
+
+- Delete a task:
+
+`task {{task_id}} delete`
+
+- List all open tasks:
+
+`task list`
+
+- List open tasks due before the end of the week:
+
+`task list due.before:{{eow}}`
+
+- Show a graphical burndown chart, by day:
+
+`task burndown.daily`
+
+- List all reports:
+
+`task reports`