fix: dev_token_lib supply/2 3 & user_supply/3 balances sum fix

[charmful0x]

this PR fixe inconsistency bugs in dev_token_lib.erl

• supply/2 - supply/3 and user_supply/3 did lists:sum on mapped values where they could contained trie@1.0 KVs when using supply (or other fns) on dev_token (or whatever device that uses dev_trie for balances). fixed that bu filtering by is_numer/1 before sum, and added the post-fix repro test

• unsubscribe/4 was incorrectly passing Action for <<"action">> instead of only to <<"subscribe-action">> - fixed that:

        #{
            <<"action">> => <<"unsubscribe">>,
            <<"subscribe-action">> => Action,
            <<"subscribe-target">> => Target
        },