fix(php): Fix digits in variable not highlighted correctly

- The number constant regex also seems broken

php.nanorc

@@ -11,7 +11,7 @@ color brightblue "(class|extends|goto) ([a-zA-Z0-9_]*)"
 color brightblue "\<(var|class|function|echo|case|break|default|exit|switch|if|else|elseif|endif|foreach|endforeach|@|while|public|private|protected|return|const|static|extends|as|array|require|include|require_once|include_once|define|do|continue|declare|goto|print|in|namespace|use)\>"
 color brightblue "[a-zA-Z0-9_]+:"
 # Variables
-#color green "\$[a-zA-Z_0-9]*|[=!<>]"
+#color green "\$[a-zA-Z_0-9$]*|[=!<>]"
 #color green "\->[a-zA-Z_0-9$]*|[=!<>]"
 color green "\$[a-zA-Z_0-9]*"
 color green "\->[a-zA-Z_0-9]*"
@@ -24,7 +24,7 @@ color yellow "[.,{}();]"
 color cyan "\["
 color cyan "\]"
 # Numbers
-color magenta "[+-]*([0-9]\.)*[0-9]+([eE][+-]?([0-9]\.)*[0-9])*"
+color magenta "\<[+-]?([0-9]*\.)?[0-9]+([eE][+-]?[0-9]+)?\>"
 color magenta "0x[0-9a-zA-Z]*"
 # Special Variables
 color brightblue "(\$this|parent::|self::|\$this->)"
@@ -47,7 +47,7 @@ color red "\"([^"\]|\\.)*\""
 # Single quoted string
 color red "'([^'\]|\\.)*'"
 # Heredoc (typically ends with a semicolon).
-color red start="<<<['\"]?[A-Z][A-Z0-9_]*['\"]?" end="^[A-Z][A-Z0-9_]*;"
+color red start="<<<[\"]?[A-Z][A-Z0-9_]*[\"]?" end="^[A-Z][A-Z0-9_]*;"
 # Inline Variables
 color white "\{\$[^}]*\}"
 # Online Comments
@@ -60,3 +60,5 @@ color red start="\?>" end="<\?(php|=)?"
 color ,green "[[:space:]]+$"
 # multi-line comments
 color brightyellow start="/\*" end="\*/"
+# Nowdoc
+color red start="<<<'[A-Z][A-Z0-9_]*'" end="^[A-Z][A-Z0-9_]*;"