Fix index ID creation

Meilisearch index UID only allows alphanumeric characters,
hyphens, and underscores. With this change, we handle dict
bundle identifiers correctly so that a valid UID is always
created from them.

This fixes the issue described in
https://www.alfredforum.com/topic/16134-better-dictionaries/page/5/#findComment-117683

info.plist

@@ -890,7 +890,7 @@ Subsequent searches should be snappy
 	<key>variablesdontexport</key>
 	<array/>
 	<key>version</key>
-    <string>0.2.17</string>
+	<string>0.2.18</string>
 	<key>webaddress</key>
 	<string>https://github.com/mr-pennyworth/alfred-better-dictionaries</string>
 </dict>

pyapp/BetterDict.py

@@ -233,8 +233,10 @@ def all_dict_paths():
 
 
 def get_dict_id(info):
-    # meilisearch index doesn't allow periods in name
-    return info["CFBundleIdentifier"].replace(".", "-")
+    # meilisearch index only allows alphanumeric characters, hyphens, and
+    # underscores in the index name, so replace all other characters with
+    # hyphens.
+    return re.sub(r"[^a-zA-Z0-9_-]", "-", info["CFBundleIdentifier"])
 
 
 def get_dict_name(info):