Allow for . (dot) and - (minus) charaters in did ethr-network (method-specific-id)

[PeterTheOne]

There are some regular expression that only allow \\w (ALPHA / DIGIT / "_") in the the ethr-network part of the ethr-did.

Examples I found:

kotlin-did-jwt/ethr-did/src/main/java/me/uport/sdk/ethrdid/EthrDIDResolver.kt

Line 364 in 208d9f1

"^(did:)?((\\w+):)?((\\w+):)?((0x)([0-9a-fA-F]{40}))".toRegex()

kotlin-did-jwt/ethr-did/src/main/java/me/uport/sdk/ethrdid/EthrDIDResolver.kt

Line 352 in 208d9f1

private val identityExtractPattern = "^did:ethr:((\\w+):)?(0x[0-9a-fA-F]{40})".toRegex()

kotlin-did-jwt/jwt-test/src/main/java/me/uport/sdk/jwt/test/EthrDIDTestHelpers.kt

Line 11 in cd4ada4

private val didParsePattern = "^(did:)?((\\w+):)?((\\w+):)?(0x[0-9a-fA-F]{40})".toRegex()

Although the ethr-method only specifies a fixed set of networks in its spec, the more general did-core allows for ALPHA / DIGIT / "." / "-" / "_". I want this lib to be future proof for new networks with dot and minus in their network name!

I'm planning to add a network to the spec if a - in the name.