Use storage::append in the implementation of the storage types (#5889)

* Start improving `storage_append`

* Fix some stuff

* Fix compilation

* Update docs and add new test

* More tests

* Test kill + append

substrate/Cargo.lock

@@ -126,15 +126,15 @@ dependencies = [
 
 [[package]]
 name = "arbitrary"
-version = "0.4.2"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1148c9b25d393a07c4cc3ef5dd30f82a40a1c261018c4a670611ed8e76cad3ea"
+checksum = "75153c95fdedd7db9732dfbfc3702324a1627eec91ba56e37cd0ac78314ab2ed"
 
 [[package]]
 name = "arc-swap"
-version = "0.4.6"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b585a98a234c46fc563103e9278c9391fde1f4e6850334da895d27edb9580f62"
+checksum = "d663a8e9a99154b5fb793032533f6328da35e23aac63d5c152279aa8ba356825"
 
 [[package]]
 name = "arrayref"
@@ -280,9 +280,9 @@ dependencies = [
 
 [[package]]
 name = "backtrace-sys"
-version = "0.1.36"
+version = "0.1.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78848718ee1255a2485d1309ad9cdecfc2e7d0362dd11c6829364c6b35ae1bc7"
+checksum = "7de8aba10a69c8e8d7622c5710229485ec32e9d55fdad160ea559c086fdcd118"
 dependencies = [
  "cc",
  "libc",
@@ -452,9 +452,9 @@ dependencies = [
 
 [[package]]
 name = "bs58"
-version = "0.3.1"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "476e9cd489f9e121e02ffa6014a8ef220ecb15c05ed23fc34cca13925dc283fb"
+checksum = "b170cd256a3f9fa6b9edae3e44a7dfdfc77e8124dbc3e2612d75f9c3e2396dae"
 
 [[package]]
 name = "bstr"
@@ -553,9 +553,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.51"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c9384ca4b90c0ea47e19a5c996d6643a3e73dedf9b89c65efb67587e34da1bb"
+checksum = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
 dependencies = [
  "jobserver",
 ]
@@ -1147,18 +1147,18 @@ dependencies = [
 
 [[package]]
 name = "enumflags2"
-version = "0.6.4"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83c8d82922337cd23a15f88b70d8e4ef5f11da38dd7cdb55e84dd5de99695da0"
+checksum = "a80e524ebf194285b57e5e7944018721c7fffc673253f5183f7accd88a2a3b0c"
 dependencies = [
  "enumflags2_derive",
 ]
 
 [[package]]
 name = "enumflags2_derive"
-version = "0.6.4"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "946ee94e3dbf58fdd324f9ce245c7b238d46a66f00e86a020b71996349e46cce"
+checksum = "2ed9afacaea0301eefb738c9deea725e6d53938004597cdc518a8cf9a7aa2f03"
 dependencies = [
  "proc-macro2",
  "quote 1.0.3",
@@ -2001,9 +2001,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.11"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a0d737e0f947a1864e93d33fdef4af8445a00d1ed8dc0c8ddb73139ea6abf15"
+checksum = "725cf19794cf90aa94e65050cb4191ff5d8fa87a498383774c47b332e3af952e"
 dependencies = [
  "libc",
 ]
@@ -2156,9 +2156,9 @@ dependencies = [
 
 [[package]]
 name = "hyper"
-version = "0.13.5"
+version = "0.13.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96816e1d921eca64d208a85aab4f7798455a8e34229ee5a88c935bdee1b78b14"
+checksum = "ed6081100e960d9d74734659ffc9cc91daf1c0fc7aceb8eaa94ee1a3f5046f2e"
 dependencies = [
  "bytes 0.5.4",
  "futures-channel",
@@ -2187,7 +2187,7 @@ dependencies = [
  "bytes 0.5.4",
  "ct-logs",
  "futures-util",
- "hyper 0.13.5",
+ "hyper 0.13.4",
  "log",
  "rustls",
  "rustls-native-certs",
@@ -3857,9 +3857,9 @@ dependencies = [
 
 [[package]]
 name = "num_cpus"
-version = "1.13.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
+checksum = "46203554f085ff89c235cd12f7075f3233af9b11ed7c9e16dfe2560d03313ce6"
 dependencies = [
  "hermit-abi",
  "libc",
@@ -4880,7 +4880,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3a704eb390aafdc107b0e392f56a82b668e3a71366993b5340f5833fd62505e"
 dependencies = [
  "lock_api",
- "parking_lot_core 0.7.2",
+ "parking_lot_core 0.7.1",
 ]
 
 [[package]]
@@ -4900,9 +4900,9 @@ dependencies = [
 
 [[package]]
 name = "parking_lot_core"
-version = "0.7.2"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d58c7c768d4ba344e3e8d72518ac13e259d7c7ade24167003b8488e10b6740a3"
+checksum = "0e136c1904604defe99ce5fd71a28d473fa60a12255d511aa78a9ddf11237aeb"
 dependencies = [
  "cfg-if",
  "cloudabi",
@@ -5604,9 +5604,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.3.7"
+version = "1.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6020f034922e3194c711b82a627453881bc4682166cabb07134a10c26ba7692"
+checksum = "7f6946991529684867e47d86474e3a6d0c0ab9b82d5821e314b1ede31fa3a4b3"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -6545,7 +6545,7 @@ dependencies = [
  "fnv",
  "futures 0.3.4",
  "futures-timer 3.0.2",
- "hyper 0.13.5",
+ "hyper 0.13.4",
  "hyper-rustls",
  "log",
  "num_cpus",
@@ -7959,9 +7959,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "structopt"
-version = "0.3.14"
+version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "863246aaf5ddd0d6928dfeb1a9ca65f505599e4e1b399935ef7e75107516b4ef"
+checksum = "ff6da2e8d107dfd7b74df5ef4d205c6aebee0706c647f6bc6a2d5789905c00fb"
 dependencies = [
  "clap",
  "lazy_static",
@@ -7970,9 +7970,9 @@ dependencies = [
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.7"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d239ca4b13aee7a2142e6795cbd69e457665ff8037aed33b3effdc430d2f927a"
+checksum = "a489c87c08fbaf12e386665109dd13470dcc9c4583ea3e10dd2b4523e5ebd9ac"
 dependencies = [
  "heck",
  "proc-macro-error",
@@ -8122,7 +8122,7 @@ dependencies = [
  "async-std",
  "derive_more",
  "futures-util",
- "hyper 0.13.5",
+ "hyper 0.13.4",
  "log",
  "prometheus",
  "tokio 0.2.18",
@@ -8404,9 +8404,9 @@ dependencies = [
 
 [[package]]
 name = "sysinfo"
-version = "0.13.4"
+version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cac193374347e7c263c5f547524f36ff8ec6702d56c8799c8331d26dffe8c1e"
+checksum = "5a0338198966bde7feb14b011a33d404a62a6e03b843352c71512a2a002634b7"
 dependencies = [
  "cfg-if",
  "doc-comment",
@@ -8514,11 +8514,12 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.1.43"
+version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
+checksum = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
 dependencies = [
  "libc",
+ "redox_syscall",
  "winapi 0.3.8",
 ]
 
@@ -9379,18 +9380,18 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "14.0.0"
+version = "13.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47b11c94c63d5365a76ea287f8e6e5b6050233fae4b2423aea2a1e126a385e17"
+checksum = "5b20abd8b4a26f7e0d4dd5e357e90a3d555ec190e94472c9b2b27c5b9777f9ae"
 dependencies = [
  "leb128",
 ]
 
 [[package]]
 name = "wat"
-version = "1.0.15"
+version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03db18bc33cff3859c296efbefdcc00763a644539feeadca3415a1cee8a2835d"
+checksum = "51a615830ee3e7200b505c441fec09aac2f114deae69df52f215cb828ba112c4"
 dependencies = [
  "wast",
 ]
@@ -9472,9 +9473,9 @@ checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
 [[package]]
 name = "winapi-util"
-version = "0.1.5"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+checksum = "fa515c5163a99cc82bab70fd3bfdd36d827be85de63737b40fcef2ce084a436e"
 dependencies = [
  "winapi 0.3.8",
 ]