Breaking changes in v2.0.0

[michaeldiamant]

Itemizes functionality that will be removed in the upcoming major release.

Task list for algorand-sdk-testing stories:

• Deprecation follow up: Remove DryrunTxnResult.cost algorand-sdk-testing#201 - Enhancement: DryrunTxnResult cost field removal #412
• Deprecation follow up: Remove mapping from CompileResponse.sourcemap algorand-sdk-testing#202 - N/A no removal needed
• Deprecation follow up: Remove langspec.json-related resources algorand-sdk-testing#223 - Enhancement: Remove langspec.json #411
• Remove logicsig templates from SDKs algorand-sdk-testing#254 - Remove logicsig templates from SDKs for v2.0.0 breaking changes #410
• SDKs: Drop algod v1 REST API support  algorand-sdk-testing#255 - Remove v1 algod #418
• Generator does not delete files for items removed from API spec generator#46 - N/A no generated source code

[algochoi]

Let's consider changing wait_rounds to match the other SDKs - when the value is zero, the other SDKs wait zero rounds instead of 1000 (e.g. JS)

Related PR: #380