Add wasm dev-deps using CI script

We only test WASM in CI using a stable toolchain however because we have
a target specific dev-dependencies section the wasm deps get pulled in
during MSRV builds - this breaks the MSRV build.

Instead of including WASM dev-dependencies in the manifest we can
dynamically modify the manifest when running the WASM tests. We do this
already to add the `crate-type` section so this is not really that
surprising to see in the CI script.

Doing so allows us to stop pinning the transitive `syn` dependency also
which is included in the dependency graph because of `wasm-bingen-test`.

Cargo-minimal.lock

@@ -94,7 +94,6 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_test",
- "wasm-bindgen-test",
 ]
 
 [[package]]
@@ -107,12 +106,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "bumpalo"
-version = "3.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12ae9db68ad7fac5fe51304d20f016c911539251075a214f8e663babefa35187"
-
 [[package]]
 name = "byteorder"
 version = "1.3.0"
@@ -131,22 +124,6 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4c819a1287eb618df47cc647173c5c4c66ba19d888a6e50d605672aed3140de"
 
-[[package]]
-name = "cfg-if"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
-[[package]]
-name = "console_error_panic_hook"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a06aeb73f470f66dcdbf7223caeebb85984942f22f1adb2a088cf9668146bbbc"
-dependencies = [
- "cfg-if 1.0.0",
- "wasm-bindgen",
-]
-
 [[package]]
 name = "core2"
 version = "0.3.2"
@@ -168,7 +145,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee8025cf36f917e6a52cce185b7c7177689b838b7ec138364e50cc2277a56cf4"
 dependencies = [
- "cfg-if 0.1.2",
+ "cfg-if",
  "libc",
  "wasi",
 ]
@@ -211,15 +188,6 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
 
-[[package]]
-name = "js-sys"
-version = "0.3.46"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf3d7383929f7c9c7c2d0fa596f325832df98c3704f2c60553080f7127a58175"
-dependencies = [
- "wasm-bindgen",
-]
-
 [[package]]
 name = "json"
 version = "0.12.4"
@@ -238,15 +206,6 @@ version = "0.2.64"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "74dfca3d9957906e8d1e6a0b641dc9a59848e793f1da2165889fd4f62d10d79c"
 
-[[package]]
-name = "log"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3a89a0c46ba789b8a247d4c567aed4d7c68e624672d238b45cc3ec20dc9f940"
-dependencies = [
- "cfg-if 0.1.2",
-]
-
 [[package]]
 name = "memchr"
 version = "2.0.0"
@@ -398,12 +357,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "scoped-tls"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea6a9290e3c9cf0f18145ef7ffa62d68ee0bf5fcd651017e586dc7fd5da448c2"
-
 [[package]]
 name = "secp256k1"
 version = "0.27.0"
@@ -515,103 +468,3 @@ name = "wasi"
 version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
-
-[[package]]
-name = "wasm-bindgen"
-version = "0.2.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3cd364751395ca0f68cafb17666eee36b63077fb5ecd972bbcd74c90c4bf736e"
-dependencies = [
- "cfg-if 1.0.0",
- "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1114f89ab1f4106e5b55e688b828c0ab0ea593a1ea7c094b141b14cbaaec2d62"
-dependencies = [
- "bumpalo",
- "lazy_static",
- "log",
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-futures"
-version = "0.4.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fe9756085a84584ee9457a002b7cdfe0bfff169f45d2591d8be1345a6780e35"
-dependencies = [
- "cfg-if 1.0.0",
- "js-sys",
- "wasm-bindgen",
- "web-sys",
-]
-
-[[package]]
-name = "wasm-bindgen-macro"
-version = "0.2.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6ac8995ead1f084a8dea1e65f194d0973800c7f571f6edd70adf06ecf77084"
-dependencies = [
- "quote",
- "wasm-bindgen-macro-support",
-]
-
-[[package]]
-name = "wasm-bindgen-macro-support"
-version = "0.2.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5a48c72f299d80557c7c62e37e7225369ecc0c963964059509fbafe917c7549"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-shared"
-version = "0.2.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e7811dd7f9398f14cc76efd356f98f03aa30419dea46aa810d71e819fc97158"
-
-[[package]]
-name = "wasm-bindgen-test"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c3d30c1e43ebb4c4835f8163456d16f83dd6c1831424cb22680c680ef5f8ea8"
-dependencies = [
- "console_error_panic_hook",
- "js-sys",
- "scoped-tls",
- "wasm-bindgen",
- "wasm-bindgen-futures",
- "wasm-bindgen-test-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-test-macro"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f093012630c0c14be061ac7a8d99f82a94e2b1cfd74619fa71090705d2c91be"
-dependencies = [
- "proc-macro2",
- "quote",
-]
-
-[[package]]
-name = "web-sys"
-version = "0.3.36"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "721c6263e2c66fd44501cc5efbfa2b7dfa775d13e4ea38c46299646ed1f9c70a"
-dependencies = [
- "js-sys",
- "wasm-bindgen",
-]