BC - General Reworking, Bug Fixes, Code Cleanup, Name Changes

• removed deprecated
• insure only actual message is rethrow in Task result()
• make all classes final, have shutdown handle if called by signal handler or any task
• add Windows signal constants if libuv is loaded
• added methods/functions for basic UV file system operations
• added function to control file operations by child/subprocess or libuv thread pool, will use other if not install.
• additional libuv system tests
• keep Task error trace
• updated UV libuv stubs
• add option to display child subprocess output
• rename example files
• deprecated awaitProcess
• added spawn_system to quickly run any PHP build in system command in subprocess
• added more examples and general functions for non libuv usage
• add option for Processor Channel class to be passed into subprocess parameters
• add option to pass in a task to use for real-time subprocess interaction
• rework Channel class, grab task object instead and return to caller
• update channel test to show usage between coroutine tasks
• additional shorthand file operation functions, update all to return false on failure except file_read and file_write, for now, will also be changed to return false instead.
• add async replacement methods for file_get_contents and file_put_…contents
• various bug fixes

1.6.2

bug fixes, gather wasn't properly handling errors and cancelled tasks

1.6.1: deprecations, corrections, updates

• deprecated gatherOptions
• added gatherWait() combines gatherOptions with gather()
• refactor gather() to follow more of Python's specs
• more test coverage

Update required version, additional BC from `symplely/processor`

• update gather to check if task id is valid task, throw if not
• update docs/readme in reference to future libuv extension addition.
• added signal constants to base, mainly for Windows, always use pcntl if Linux
• added working libuv tests/examples from https://github.com/bwoebi/php-uv
• added return value() function when placed insure any function/method is
  awaitable and to capture return value for gather()

1.5.0: update, added/tested `libuv` signal feature, giving Windows POSIX han…

…dling

- use `hrtime` high resolution time, if PHP 7.3
- update `shutdown` kill/stop any running subprocess
- rework `gather` to better handle exceptions
- added `IS_WINDOWS` and `IS_LINUX` constants

1.4.3: added `spawn_task()` to quickly add/execute code in a subprocess, in …

…parallel

- drop deprecated
- name changes
- bug fixes, corrections

more corrections, update readme, docblocks, ci setup, test coverage

1.4.2

Update Core.php

1.4.1: corrections, name changes, code cleanup, drop deprecated

- have consistent naming for bool like functions
- ignore some code coverage until `libuv` is added
- updated tests and examples to be inline with current release
- added and removed deprecated routines
- updated readme, added a clearer coroutine meaning used here

1.4.0: code cleanup, BC renaming - have consistent naming for bool like func…

…tions

General refactoring/preparing for `libuv`, an native event loop engine, which bring BC

• this version deprecating functions/methods await, parallelInstance, processInstance, createSubProcess, taskList, completedList, updateCompleted
• added function spawn_process() wil launch sub process, and return task id, and away() will create task and return task id
• added signaling functionality, signals are possible on Windows with libuv https://github.com/bwoebi/php-uv, this will be in version 2.0
• added private methods for using libuv, to be call by current methods
• improved docblock commenting