chore(spell): update (#49)

Author: Snoopy1866

cspell.json

@@ -6,14 +6,22 @@
   "language": "en",
   // words - list of words to be always considered correct
   "words": [
+    "brenth",
+    "brentq",
     "codecov",
-    "scipy",
+    "ndigits",
+    "nullproportion",
     "pingouin",
-    "pystatpower",
-    "PyStatPower",
-    "brenth",
     "proportion",
-    "nullproportion",
-    "ospp"
+    "PyStatPower",
+    "pystatpower",
+    "radd",
+    "rmul",
+    "rtruediv",
+    "rfloordiv",
+    "rmod",
+    "rpow",
+    "scipy",
+    "unpooled"
   ]
 }