text-is-upper-case (npm): Returns `true` if text is upper case only.
Keywords: is|upper|is-upper|is-upper-case|case|check|boolean|camel-case|capital-case|change|change-case|constant-case|convert|dot-case|header-case|javascript|lowercase|no-case|param-case|pascal-case|path-case|sentence-case|snake-case|transformer|uppercase