v0.4.8

Changelog

3507e53 fix project deletion panics (#39)
f703e45 Add ArgoCD 1.8.x to acceptance testing matrix (#43)
33df71b tests: build against go1.15
8b27f4a updated README about container images side-loading
b791194 build against Go 1.15, update local development testing ArgoCD version to 1.8.2
29467e4 test against argocd 1.8.x
2d88e14 Portable, cross-platform tests settings (#42)
dfcad7f Adds ArgoCD 1.7.x acceptance testing (#36)