chore: upgrade all dependencies (#294)

Upgrade all dependencies. Notable changes:

- Upgrade of `ic-stable-structures`: Starting with version
[0.6.0](https://github.com/dfinity/stable-structures/releases/tag/v0.6.0),
the trait `BoundedStorable` was merged into `Storable`
- Migrated all integration tests to using [Pocket
IC](https://crates.io/crates/pocket-ic) to avoid having to depend on the
unreleased `ic-state-machine-tests` crate from the IC repository, which
would require additional dependencies to be built.

.github/workflows/ci.yml

@@ -37,6 +37,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@master
 
+      - name: Provision Pocket IC
+        run: bash .github/workflows/provision-pocket-ic-server.sh
+
       - uses: Swatinem/rust-cache@v2
 
       - name: Install Protoc

.github/workflows/provision-pocket-ic-server.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+set -ex
+
+POCKET_IC_SERVER_VERSION=${POCKET_IC_SERVER_VERSION:=6.0.0}
+POCKET_IC_SERVER_PATH=${POCKET_IC_SERVER_PATH:="${HOME}/bin/pocket-ic-server"}
+
+if [[ $OSTYPE == "linux-gnu"* ]] || [[ $RUNNER_OS == "Linux" ]]
+then
+    PLATFORM=linux
+elif [[ $OSTYPE == "darwin"* ]] || [[ $RUNNER_OS == "macOS" ]]
+then
+    PLATFORM=darwin
+else
+    echo "OS not supported: ${OSTYPE:-$RUNNER_OS}"
+    exit 1
+fi
+
+if [ ! -f "$POCKET_IC_SERVER_PATH" ]; then
+  echo "Downloading PocketIC."
+  mkdir -p "$(dirname "${POCKET_IC_SERVER_PATH}")"
+  curl -sSL "https://github.com/dfinity/pocketic/releases/download/${POCKET_IC_SERVER_VERSION}/pocket-ic-x86_64-${PLATFORM}.gz" -o "${POCKET_IC_SERVER_PATH}".gz
+  gunzip "${POCKET_IC_SERVER_PATH}.gz"
+  chmod +x "${POCKET_IC_SERVER_PATH}"
+else
+    echo "PocketIC server already exists, skipping download."
+fi
+
+# Set environment variables.
+echo "POCKET_IC_BIN=${POCKET_IC_SERVER_PATH}" >> "$GITHUB_ENV"

.gitignore

@@ -7,3 +7,4 @@ target/
 *.generated.did
 *.wasm
 *.wasm.gz
+pocket-ic