correct spelling mistake

Author: EdwardBetts

readme.markdown

@@ -140,7 +140,7 @@ var test = require('tape')
 ## test([name], [opts], cb)
 
 Create a new test with an optional `name` string and optional `opts` object.
-`cb(t)` fires with the new test object `t` once all preceeding tests have
+`cb(t)` fires with the new test object `t` once all preceding tests have
 finished. Tests execute serially.
 
 Available `opts` options are: