Feature/various improvements (#1282)

* Added abci::Data field to ExecuteResult

* optional serde support for ed25519 keys

* optional serde support for x25519 keys

* actually calling dotenv at validator API startup

* Added STATE_DENOM network specific constant

* unit test fixes

Cargo.lock

@@ -1063,6 +1063,8 @@ dependencies = [
  "pemstore",
  "rand 0.7.3",
  "rand_chacha 0.2.2",
+ "serde",
+ "serde_bytes",
  "subtle-encoding",
  "x25519-dalek",
 ]
@@ -1427,6 +1429,7 @@ version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d5c4b5e5959dc2c2b89918d8e2cc40fcdd623cef026ed09d2f0ee05199dc8e4"
 dependencies = [
+ "serde",
  "signature",
 ]
 
@@ -1440,6 +1443,7 @@ dependencies = [
  "ed25519",
  "rand 0.7.3",
  "serde",
+ "serde_bytes",
  "sha2",
  "zeroize",
 ]
@@ -4835,9 +4839,9 @@ dependencies = [
 
 [[package]]
 name = "serde_bytes"
-version = "0.11.5"
+version = "0.11.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16ae07dd2f88a366f15bd0632ba725227018c69a1c8550a927324f8eb8368bb9"
+checksum = "212e73464ebcde48d723aa02eb270ba62eff38a9b732df31f33f1b4e145f3a54"
 dependencies = [
  "serde",
 ]