scripts: update pyocd in requirements.txt

This includes a bugfix for a pyocd requirement on pyyaml
that could not be satisfied using officially supported
releases.

Signed-off-by: Marti Bolivar <[email protected]>

Author: mbolivar-nordic

scripts/requirements.txt

@@ -10,7 +10,7 @@ ply==3.10
 hub==2.0
 gitlint
 pyelftools==0.24
-pyocd==0.16.1
+pyocd==0.19.0
 pyserial
 pykwalify
 # "win32" is used for 64-bit Windows as well