Fix getBlockByHash()

[adrianmurage]

Block by hash seems to not return a value

Update after http re-write:

The error handling for the demos.getBlockByHash() function seems to be trying to parse a non json object. The function still does not work.

[linear]

DEM-65 Fix getBlockByHash

Block by hash seems to not return a value

image.png

[tcsenpai]

see DEM-91 for a possible solution

[tcsenpai]

replace blockHash with hash in the sdk for this call (params) @cwilvx