[gruvbox-dark theme] Update colors

The colors were off for certain words in c++ and Java so this is to correct those mistakes.

Author: SpokenBanana

theme/gruvbox-dark.css

@@ -12,23 +12,26 @@
 .cm-s-gruvbox-dark .CodeMirror-linenumber {color: #7c6f64;}
 .cm-s-gruvbox-dark .CodeMirror-cursor { border-left: 1px solid #ebdbb2; }
 .cm-s-gruvbox-dark div.CodeMirror-selected { background: #928374; }
-.cm-s-gruvbox-dark span.cm-meta { color: #808000; }
+.cm-s-gruvbox-dark span.cm-meta { color: #83a598; }
 
 .cm-s-gruvbox-dark span.cm-comment { color: #928374; }
 .cm-s-gruvbox-dark span.cm-number, span.cm-atom { color: #d3869b; }
 .cm-s-gruvbox-dark span.cm-keyword { color: #f84934; }
 
 .cm-s-gruvbox-dark span.cm-variable { color: #ebdbb2; }
 .cm-s-gruvbox-dark span.cm-variable-2 { color: #ebdbb2; }
-.cm-s-gruvbox-dark span.cm-variable-3, .cm-s-gruvbox-dark span.cm-type { color: black; }
+.cm-s-gruvbox-dark span.cm-variable-3, .cm-s-gruvbox-dark span.cm-type { color: #fabd2f; }
 .cm-s-gruvbox-dark span.cm-operator { color: #ebdbb2; }
+.cm-s-gruvbox-dark span.cm-callee { color: #ebdbb2; }
 .cm-s-gruvbox-dark span.cm-def { color: #ebdbb2; }
+.cm-s-gruvbox-dark span.cm-property { color: #ebdbb2; }
 .cm-s-gruvbox-dark span.cm-string { color: #b8bb26; }
 .cm-s-gruvbox-dark span.cm-string-2 { color: #8ec07c; }
-.cm-s-gruvbox-dark span.cm-qualifier { color: #555; }
+.cm-s-gruvbox-dark span.cm-qualifier { color: #8ec07c; }
 .cm-s-gruvbox-dark span.cm-attribute { color: #8ec07c; }
 
 .cm-s-gruvbox-dark .CodeMirror-activeline-background { background: #3c3836; }
 .cm-s-gruvbox-dark .CodeMirror-matchingbracket { background: #928374; color:#282828 !important; }
 
 .cm-s-gruvbox-dark span.cm-builtin { color: #fe8019; }
+.cm-s-gruvbox-dark span.cm-tag { color: #fe8019; }