parseKeyPairsIntoRecord does not parse if value conatains equals

[krosenk729]

What happened?

Steps to Reproduce

var exampleValidBaggage = `key=aGVsbG8gd29ybGQhOiE6IQ==`;
var res = parseKeyPairsIntoRecord(exampleValidBaggage)
// res will not have the parsed key as expected

Expected Result

the above example should parse the value to
{ key: 'aGVsbG8gd29ybGQhOiE6IQ==' }

Actual Result

the above example is returning {}

Additional Details

according to https://github.com/w3c/baggage/blob/main/baggage/HTTP_HEADER_FORMAT.md, value MAY contain any number of the equal sign (=) characters. Parsers MUST NOT assume that the equal sign is only used to separate key and value.

however, parseKeyPairsIntoRecord is assuming the equal sign is only a key separator

OpenTelemetry Setup Code

No response

package.json

No response

Relevant log output

No response

[pichlermarc]

Hi, thanks for reaching out.
This does indeed look like a bug. I see that you already proposed a fix. Would you mind if I assign this issue to you?

[krosenk729]

@pichlermarc yes please assign it to me! thanks