add tap-csv encoding option (#758)

* add tap-csv encoding option

* Update _data/meltano/extractors/tap-csv/meltanolabs.yml

_data/meltano/extractors/tap-csv/meltanolabs.yml

@@ -18,26 +18,26 @@ settings:
   label: Files
   kind: array
   description: |
-    Array of objects with `entity`, `path`, and `keys` keys:
+    Array of objects with `entity`, `path`, `keys`, and `encoding` [Optioanl] keys:
 
     * `entity`: The entity name, used as the table name for the data loaded from that CSV.
     * `path`: Local path (relative to the project's root) to the file to be ingested. Note that this may be a directory, in which case all files in that directory and any of its subdirectories will be recursively processed
     * `keys`: The names of the columns that constitute the unique keys for that entity.
-
-    Each input CSV file must be a traditionally-delimited CSV (comma separated columns, newlines indicate new rows, double quoted values).
+    * `encoding`: [Optional] The file encoding to use when reading the file (i.e. "latin1", "UTF-8"). Use this setting when you get a UnicodeDecodeError error.
+      Each input CSV file must be a traditionally-delimited CSV (comma separated columns, newlines indicate new rows, double quoted values).
 
     The first row is the header defining the attribute name for that column and will result to a column of the same name in the database. It must have a valid format with no spaces or special characters (like for example `!` or `@`, etc).
 - name: csv_files_definition
   label: CSV Files Definition
   description: |
-    Project-relative path to JSON file holding array of objects with `entity`, `path`, and `keys` keys, as ascribed under [Files](#files):
+    Project-relative path to JSON file holding array of objects with `entity`, `path`, `keys`, and `encoding` [Optional] keys, as ascribed under [Files](#files):
 
     ```json
     [
       {
         "entity": "<entity>",
         "path": "<path>",
-        "keys": ["<key>"]
+        "keys": ["<key>"],
       },
       // ...
     ]