fix: forced lowerCase transform on ansi file path (notwaldorf#125)

When adding a custom filepath to (.profile|.bash_rc), the previous JS
code forced a lowerCase transformation on string stored in TTC_SAY_BOX.
If the string is a path to custom ansi art, and the user follows a capitalized
directory convention on their sys, the tranformed filepath would be wrong - resulting
in an error within the tiny-care-terminal. The fix: add a simple regex to check
if the string stored in the TTC_SAY_BOX env var is indeed a filepath, if it is,
then send that string; otherwise, proceed to transform the string.

config.js

@@ -4,7 +4,9 @@ var config = {
   twitter: (process.env.TTC_BOTS || 'tinycarebot,selfcare_bot,magicrealismbot').toLowerCase().split(',').map(s => s.trim()),
 
   // Use this to have a different animal say a message in the big box.
-  say: (process.env.TTC_SAY_BOX || 'parrot').toLowerCase(),
+  // regex: if TTC_SAY_BOX is a filePath, return that path
+  say: /(\w[~\/])/.test(process.env.TTC_SAY_BOX)
+    ? process.env.TTC_SAY_BOX : (process.env.TTC_SAY_BOX || 'parrot').toLowerCase(),
 
   // Set this to false if you want to scrape twitter.com instead of using
   // API keys. The tweets may include RTs in this case :(