Auto merge of #5470 - flip1995:rollup-cvkuiza, r=flip1995

Rollup of 5 pull requests

Successful merges:

 - #5226 (Add lint for explicit deref and deref_mut method calls)
 - #5248 (Add lint on large non scalar const)
 - #5430 (Disallow bit-shifting in integer_arithmetic)
 - #5466 (large_enum_variant: Report sizes of variants)
 - #5468 (Zero single char names)

Failed merges:

r? @ghost

changelog: rollup