updating egg group names to modern equivalents (#190)

Author: digitalghost-dev

cmd/pokemon/pokemon.go

@@ -112,6 +112,20 @@ func PokemonCommand() (string, error) {
 				capitalizedEggGroup := cases.Title(language.English).String(entry.Name)
 				eggGroupSlice = append(eggGroupSlice, capitalizedEggGroup)
 			}
+			modernEggGroupNames = map[string]string{
+				"indeterminate": "Amorphous",
+				"ground":        "Field",
+				"humanshape":    "Human-Like",
+				"plant":         "Grass",
+				"no-eggs":       "Undiscovered",
+			}
+
+			if name, exists := modernEggGroupNames[entry.Name]; exists {
+				eggGroupSlice = append(eggGroupSlice, name)
+			} else {
+				capitalizedEggGroup := cases.Title(language.English).String(entry.Name)
+				eggGroupSlice = append(eggGroupSlice, capitalizedEggGroup)
+			}
 
 		}