Update build.txt

v0.5.1 release

v0.5, AutoSell mode

v0.4.3, fix #10, fix #7

v0.4.2, fix fishing for users of multilure mods

v0.4.1, update to tModLoader v0.11.4, Config for slot positioning.

v0.4, filters, scroll fix.

v0.3.1, fix fishing trash destination

0.3, fixes #2

0.2.1.3 MP optimization