v0.25.3

ClimateTools v0.25.3

Diff since v0.25.2

Merged pull requests:

• fix CI (#259) (@Balinus)
• test coverage (#260) (@Balinus)
• spei gamma fit (#261) (@Balinus)
• removed old files (#262) (@Balinus)
• Update Project.toml (#263) (@Balinus)