Improve error_info() type

`erlfmt_scan` returns `erl_anno:location()` in errors however
`erlfmt_parse` mostly returns full `erlfmt_scan:anno()` maps. The errors
from the parser also surface in the return value of
`erlfmt:read_nodes[_string]`

src/erlfmt.erl

@@ -34,7 +34,9 @@
 
 -export_type([error_info/0, config_option/0, config/0, pragma/0]).
 
--type error_info() :: {file:name_all(), erl_anno:location(), module(), Reason :: any()}.
+-type error_info() :: {
+    file:name_all(), erl_anno:location() | erlfmt_scan:anno(), module(), Reason :: any()
+}.
 -type pragma() :: require | insert | delete | ignore.
 -type config_option() :: {pragma, pragma()} | {print_width, pos_integer()} | verbose.
 -type config() :: [config_option()].

src/erlfmt_parse.yrl

@@ -1034,7 +1034,7 @@ Erlang code.
 
 %% XXX. To be refined.
 -type error_description() :: term().
--type error_info() :: {erl_anno:line(), module(), error_description()}.
+-type error_info() :: {erl_anno:location() | erlfmt_scan:anno(), module(), error_description()}.
 -type token() :: erlfmt_scan:token().
 
 %% mkop(Op, Arg) -> {op,Anno,Op,Arg}.