add plus and full width plus to unicode-speech (#77)

Author: dginev

_data/unicode-speech.yml

@@ -1,4 +1,8 @@
 ---
+-
+    - char: +
+    - u: "002B"
+    - t: plus
 -
     - char: ¡
     - u: "00A1"
@@ -8014,7 +8018,7 @@
 -
     - char: ＋
     - u: "FF0B"
-    - t: equals sign
+    - t: full width plus
 -
     - char: ＜
     - u: "FF1C"