fix: use resolver 2 and full async-std for now

Fixes #21

Author: dignifiedquire

Cargo.toml

@@ -10,6 +10,7 @@ keywords = ["tar", "tarfile", "encoding"]
 readme = "README.md"
 edition = "2018"
 exclude = ["tests/archives/*"]
+resolver = "2"
 
 description = """
 A Rust implementation of an async TAR file reader and writer. This library does not
@@ -19,7 +20,7 @@ contents are never required to be entirely resident in memory all at once.
 """
 
 [dependencies]
-async-std = { version = "1.6.0", default-features = false }
+async-std = "1.6.0"
 filetime = "0.2.8"
 pin-project = "1.0.8"
 
@@ -36,4 +37,4 @@ xattr = { version = "0.2", optional = true }
 redox_syscall = "0.2"
 
 [features]
-default = ["xattr"]
+default = [ "xattr" ]