Change Js.toOpt to Js.toOption

Per offline discussion. For consistency we'll use `to[ModuleName]`.

Author: chenglou

jscomp/runtime/js.ml

@@ -61,7 +61,7 @@ type + 'a null_undefined = 'a nullable
 (** value of this type can be [undefined], [null] or ['a]
     this type is the same as {!Js.Null_undefined.t}*)
 
-external toOpt : 'a nullable  -> 'a option = "#null_undefined_to_opt"
+external toOption : 'a nullable  -> 'a option = "#null_undefined_to_opt"
 external test : 'a nullable -> bool = "#is_nil_undef"
 
 type boolean
@@ -144,4 +144,4 @@ module Promise = Js_promise
 module Option = Js_option
 module Result = Js_result
 module List = Js_list 
-module Vector = Js_vector
+module Vector = Js_vector

jscomp/runtime/js.mli

@@ -73,7 +73,7 @@ type + 'a nullable
 
 type + 'a null_undefined = 'a nullable    
 
-external toOpt : 'a nullable  -> 'a option = "#null_undefined_to_opt"
+external toOption : 'a nullable  -> 'a option = "#null_undefined_to_opt"
 external test : 'a nullable -> bool = "#is_nil_undef"
 
 type boolean
@@ -203,4 +203,4 @@ module Result = Js_result
 module List = Js_list 
 (** Provide utilties for list *)
 
-module Vector = Js_vector 
+module Vector = Js_vector