Release v1.5.6

Changes

• bfe9a89 Bump github.com/gin-gonic/gin from 1.7.1 to 1.7.3 (#12)
• 8b835b9 build.sh exit on error
• 961d257 add -trimpath build flag
• fb46156 Bump github.com/forewing/gobuild from 0.2.0 to 0.3.0
• bb5255b Bump github.com/forewing/gobuild from 0.1.1 to 0.2.0 (#9)
• 5566cfd add build error check
• 3bc483d add native go build (github.com/forewing/gobuild)
• fe45187 make build script safer
• 7707721 add release metadata
• afe9125 fix wrong argument
• f3f2ace upgrade csgo-rcon v1.2.0
• 6143191 remove unused arch in cross-compile script