Bump version to 0.7.0 (#898)

### What
Bump version to 0.7.0, creating release branch.

### Why
Triggered by @sisuresh in
https://github.com/stellar/rs-soroban-sdk/actions/runs/4493311930.

### What is next

See the release instructions for a full rundown on the release process:
https://github.com/stellar/actions/blob/main/README-rust-release.md

Commit any changes to the `release/v0.7.0` branch that are needed in
this release.

If this is a regular release releasing from `main`, merge this PR when
ready, and after merging, create a release for this version by going to
this link:
https://github.com/stellar/rs-soroban-sdk/releases/new?tag=v0.7.0&title=0.7.0

If this is a backport or patch release of a past version, see the
release instructions. When ready to release this branch create a release
by going to this link:

https://github.com/stellar/rs-soroban-sdk/releases/new?tag=v0.7.0&title=0.7.0&target=release/v0.7.0

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Siddharth Suresh <siddharth@stellar.org>

Author: github-actions[bot]

Cargo.lock

@@ -24,39 +24,39 @@ members = [
 ]
 
 [workspace.package]
-version = "0.6.0"
+version = "0.7.0"
 
 [workspace.dependencies]
-soroban-sdk = { version = "0.6.0", path = "soroban-sdk" }
-soroban-sdk-macros = { version = "0.6.0", path = "soroban-sdk-macros" }
-soroban-auth = { version = "0.6.0", path = "soroban-auth" }
-soroban-spec = { version = "0.6.0", path = "soroban-spec" }
-soroban-ledger-snapshot = { version = "0.6.0", path = "soroban-ledger-snapshot" }
-soroban-token-spec = { version = "0.6.0", path = "soroban-token-spec" }
+soroban-sdk = { version = "0.7.0", path = "soroban-sdk" }
+soroban-sdk-macros = { version = "0.7.0", path = "soroban-sdk-macros" }
+soroban-auth = { version = "0.7.0", path = "soroban-auth" }
+soroban-spec = { version = "0.7.0", path = "soroban-spec" }
+soroban-ledger-snapshot = { version = "0.7.0", path = "soroban-ledger-snapshot" }
+soroban-token-spec = { version = "0.7.0", path = "soroban-token-spec" }
 
 [workspace.dependencies.soroban-env-common]
-version = "0.0.14"
+version = "0.0.15"
 git = "https://github.com/stellar/rs-soroban-env"
-rev = "75b21696b0636bd145b7acb47a6fed4621b05978"
+rev = "cf83838ae8a07a00224f0a5a3500eb7969bac7cf"
 
 [workspace.dependencies.soroban-env-guest]
-version = "0.0.14"
+version = "0.0.15"
 git = "https://github.com/stellar/rs-soroban-env"
-rev = "75b21696b0636bd145b7acb47a6fed4621b05978"
+rev = "cf83838ae8a07a00224f0a5a3500eb7969bac7cf"
 
 [workspace.dependencies.soroban-env-host]
-version = "0.0.14"
+version = "0.0.15"
 git = "https://github.com/stellar/rs-soroban-env"
-rev = "75b21696b0636bd145b7acb47a6fed4621b05978"
+rev = "cf83838ae8a07a00224f0a5a3500eb7969bac7cf"
 
 [workspace.dependencies.stellar-strkey]
 version = "0.0.7"
 git = "https://github.com/stellar/rs-stellar-strkey"
 
 [workspace.dependencies.stellar-xdr]
-version = "0.0.14"
+version = "0.0.15"
 git = "https://github.com/stellar/rs-stellar-xdr"
-rev = "07aff1190dc3f97b889d31b2bfb77098e7db55ce"
+rev = "4655b635c698bb3bbc628bdba456df627c42ee3a"
 default-features = false
 
 # [patch."https://github.com/stellar/rs-soroban-env"]