Incompatible syntax present in some angr examples

[numin0us]

Some of angr examples have old syntax which no longer seems to work.
Take for instance opaque predicate example.

Line 9 looks like

p = angr.project.load_shellcode(trace, archinfo.ArchX86)

Which is no longer compatible with angr, the syntax should look like this

p = angr.project.load_shellcode(trace, arch='x86') 

I haven't checked all of the examples, but it may be best to pin a specific version of angr to this workshop, or just update the examples.