deps: upgrade go-toml to v2.4.2

[GreyXor]

https://github.com/pelletier/go-toml/releases/tag/v2.4.0

[knadh]

hm, looks like there is a breaking change in how empty structures are treated in this version:

$ go test -v .
go: downloading github.com/pelletier/go-toml/v2 v2.4.0
=== RUN   TestTOML_Unmarshal
=== RUN   TestTOML_Unmarshal/Empty_TOML
    toml_test.go:73:
                Error Trace:    /home/kailash/code/go/my/knadh/koanf/parsers/toml/toml_test.go:73
                Error:          Not equal:
                                expected: map[string]interface {}(nil)
                                actual  : map[string]interface {}{}

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1,2 +1,3 @@
                                -(map[string]interface {}) <nil>
                                +(map[string]interface {}) {
                                +}

                Test:           TestTOML_Unmarshal/Empty_TOML
=== RUN   TestTOML_Unmarshal/Valid_TOML
=== RUN   TestTOML_Unmarshal/Invalid_TOML_-_missing_end_quotes
=== RUN   TestTOML_Unmarshal/Complex_TOML_-_All_types
=== RUN   TestTOML_Unmarshal/Invalid_TOML_-_missing_equal
--- FAIL: TestTOML_Unmarshal (0.00s)
    --- FAIL: TestTOML_Unmarshal/Empty_TOML (0.00s)
    --- PASS: TestTOML_Unmarshal/Valid_TOML (0.00s)
    --- PASS: TestTOML_Unmarshal/Invalid_TOML_-_missing_end_quotes (0.00s)
    --- PASS: TestTOML_Unmarshal/Complex_TOML_-_All_types (0.00s)
    --- PASS: TestTOML_Unmarshal/Invalid_TOML_-_missing_equal (0.00s)
=== RUN   TestTOML_Marshal
=== RUN   TestTOML_Marshal/Empty_TOML
    toml_test.go:135:
                Error Trace:    /home/kailash/code/go/my/knadh/koanf/parsers/toml/toml_test.go:135
                Error:          Not equal:
                                expected: []byte(nil)
                                actual  : []byte{}

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1,2 +1,3 @@
                                -([]uint8) <nil>
                                +([]uint8) {
                                +}

                Test:           TestTOML_Marshal/Empty_TOML
=== RUN   TestTOML_Marshal/Valid_TOML
=== RUN   TestTOML_Marshal/Complex_TOML_-_All_types
--- FAIL: TestTOML_Marshal (0.00s)
    --- FAIL: TestTOML_Marshal/Empty_TOML (0.00s)
    --- PASS: TestTOML_Marshal/Valid_TOML (0.00s)
    --- PASS: TestTOML_Marshal/Complex_TOML_-_All_types (0.00s)
FAIL
FAIL    github.com/knadh/koanf/parsers/toml/v2  0.003s
FAIL

[GreyXor]

👍 thanks, I updated the two failing tests

[knadh]

Sorry, my point was that, between the two versions, the data type the toml lib returns has completely changed (breaking change). If we merge this as-is, it's bound to break koanf implementations out there that depend on the previous behaviour.

[GreyXor]

Sure @knadh, good catch indeed. I reverted the test and added a condition that preserve the old behavior. So the API is not silently altered anymore.