Fix issues when using parameters of type array

[ejalaa12]

Public API Changes None

Description

This PR fixes the following issues with parameters when the parameter type is an array. (in order of commits)

• the parameter type PARAMETER_STRING_ARRAY was not handled everywhere
• values of parameters of type PARAMETER_[BYTE/INTEGER/DOUBLE]_ARRAY are of type TypedArray which throws aTypeError('incompatible value') in the validate() method. This is because _validArray() (more specifically Array.isArray() returns false when given a TypedArray
• arrayElementType of PARAMETER_BYTE_ARRAY was set to PARAMETER_BYTE which is a type that does not exist (undefined). We can use PARAMETER_INTEGER instead.

Unit tests were added to reproduce the bugs, then the next commits fix those bugs.

[wayneparrott]

@ejalaa12 thx for helping improve parameter support. Your efforts have been most appreciated.

OT - may I ask how you are using rclnodejs? Also please open an issue if you have suggestions for improving the use of rclnodejs including the onboarding experience.

[ejalaa12]

@wayneparrott you're welcome. It's a great job you guys are doing already.

We're using rclnodejs as a backend to the HMI that controls our ros2 robot and some other products.

We'll be sure to drop new PR/Issue when needed :)

Thanks for the merge !