version bump: 1.0.0 -> (breaking) -> 2.0.0
error: breaking changes in `Abc`
 --> enums/new.rs:1:1
  |
1 | pub enum Abc {
  | ^^^^^^^^^^^^
  |
warning: enum variant added (breaking)
 --> enums/new.rs:2:5
  |
2 |     Abc,
  |     ^^^

error: breaking changes in `Bcd`
 --> enums/new.rs:5:1
  |
5 | pub enum Bcd {
  | ^^^^^^^^^^^^
  |
warning: enum variant removed (breaking)
 --> enums/old.rs:6:5
  |
6 |     Abc,
  |     ^^^

error: breaking changes in `Cde`
  --> enums/new.rs:9:1
   |
9  | pub enum Cde {
   | ^^^^^^^^^^^^
   |
warning: enum variant added (breaking)
  --> enums/new.rs:11:5
   |
11 |     Bcd,
   |     ^^^

error: breaking changes in `Def`
  --> enums/new.rs:14:1
   |
14 | pub enum Def {
   | ^^^^^^^^^^^^
   |
warning: enum variant removed (breaking)
  --> enums/old.rs:15:5
   |
15 |     Bcd,
   |     ^^^

error: breaking changes in `Efg`
  --> enums/new.rs:18:1
   |
18 | pub enum Efg {
   | ^^^^^^^^^^^^
   |
warning: variant with no public fields changed to a tuple variant (breaking)
  --> enums/new.rs:19:5
   |
19 |     Abc(u8),
   |     ^^^
warning: variant with public fields changed to a tuple variant (breaking)
  --> enums/new.rs:20:5
   |
20 |     Bcd,
   |     ^^^
warning: variant with public fields changed to a struct variant (breaking)
  --> enums/new.rs:21:5
   |
21 |     Cde { f: u8 },
   |     ^^^
warning: variant with public fields changed to a tuple variant (breaking)
  --> enums/new.rs:22:5
   |
22 |     Def,
   |     ^^^
warning: variant with public fields changed to a struct variant (breaking)
  --> enums/new.rs:23:5
   |
23 |     Efg { f: u8 },
   |     ^^^
warning: public field removed from variant with no private fields (breaking)
  --> enums/old.rs:25:11
   |
25 |     Ghi { f: u8 },
   |           ^^^^^
warning: public field added to variant with no private fields (breaking)
  --> enums/new.rs:25:11
   |
25 |     Ghi { g: u8 },
   |           ^^^^^

error: aborting due to 5 previous errors