lsp-jt.el fails to compile

On `M-x package-install` lsp-jt.el fails to compile: ``` lsp-jt.el:158:34:Warning: reference to free variable ‘java-tests’ lsp-jt.el:165:55:Warning: reference to free variable ‘node’ lsp-jt.el:172:24:Warning: reference to free variable ‘item’ lsp-jt.el:174:11:Warning: reference to free variable ‘treemacs-java-tests-closed-state’ lsp-jt.el:178:4:Warning: ‘:level’ called as a function lsp-jt.el:254:32:Warning: reference to free variable ‘java-tests-list’ lsp-jt.el:404:1:Error: Wrong number of arguments: (1 . 1), 0lsp-jt.el:158:34:Warning: reference to free variable ‘java-tests’ lsp-jt.el:165:55:Warning: reference to free variable ‘node’ lsp-jt.el:172:24:Warning: reference to free variable ‘item’ lsp-jt.el:174:11:Warning: reference to free variable ‘treemacs-java-tests-closed-state’ lsp-jt.el:178:4:Warning: ‘:level’ called as a function lsp-jt.el:254:32:Warning: reference to free variable ‘java-tests-list’ lsp-jt.el:404:1:Error: Wrong number of arguments: (1 . 1), 0 ```