428: Bump abci from 0.6.1 to 0.6.2 r=tomtau a=dependabot-preview[bot]

Bumps [abci](https://github.com/tendermint/rust-abci) from 0.6.1 to 0.6.2.
<details>
<summary>Changelog</summary>

*Sourced from [abci's changelog](https://github.com/tendermint/rust-abci/blob/develop/CHANGELOG.md).*

> ## v0.6.2
> 
> ### BREAKING CHANGES:
> 
> ### FEATURES:
> 
> ### IMPROVEMENTS:
> 
> ### BUG FIXES:
> -  [\#89](https://github-redirect.dependabot.com/tendermint/rust-abci/pull/89): Version of protobuf specified to the latest one (2.8.1)
> 
> *August 23, 2019*
> 
> Special thanks to external contributors on this release: [@&#8203;amanusk](https://github.com/amanusk), [@&#8203;marbar3778](https://github.com/marbar3778)
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- See full diff in [compare view](https://github.com/tendermint/rust-abci/commits)
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429: Problem: no test of prefix merkle trie determinism r=tomtau a=tomtau

Solution: added a basic quickcheck property to check trie root after insertions in different order

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Tomas Tauber <2410580+tomtau@users.noreply.github.com>

507: Problem: (CRO-503) No way to calculate square root of Milli r=tomtau a=devashishdxt

Solution: Implemented [Babylonian Method](https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method) to calculate square root.

510: Bump kvdb from 0.1.0 to 0.1.1 r=tomtau a=dependabot-preview[bot]

Bumps [kvdb](https://github.com/paritytech/parity-common) from 0.1.0 to 0.1.1.
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511: Bump kvdb-rocksdb from 0.1.5 to 0.1.6 r=tomtau a=dependabot-preview[bot]

Bumps [kvdb-rocksdb](https://github.com/paritytech/parity-common) from 0.1.5 to 0.1.6.
<details>
<summary>Commits</summary>

- [`fa938ee`](paritytech/parity-common@fa938ee) Merge pull request [#95](https://github-redirect.dependabot.com/paritytech/parity-common/issues/95) from paritytech/sp-bump-uint
- [`e388dcf`](paritytech/parity-common@e388dcf) Initialize a crate for memory related tools ([#89](https://github-redirect.dependabot.com/paritytech/parity-common/issues/89))
- [`756c608`](paritytech/parity-common@756c608) Bump primitive-types and uint version
- [`5b56003`](paritytech/parity-common@5b56003) Merge pull request [#92](https://github-redirect.dependabot.com/paritytech/parity-common/issues/92) from paritytech/td-u128
- [`39c6ee0`](paritytech/parity-common@39c6ee0) Fix for the review.
- [`9eba22f`](paritytech/parity-common@9eba22f) More compact.
- [`982228f`](paritytech/parity-common@982228f) Add some tests.
- [`e114cfb`](paritytech/parity-common@e114cfb) Expose U128, add u128 conversions.
- [`6e04748`](paritytech/parity-common@6e04748) Merge pull request [#86](https://github-redirect.dependabot.com/paritytech/parity-common/issues/86) from paritytech/sp-primitive-types-init
- [`d632b4c`](paritytech/parity-common@d632b4c) Bump primitive-types patch version
- Additional commits viewable in [compare view](paritytech/parity-common@kvdb-rocksdb-v0.1.5...primitive-types-v0.1.6)
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512: Bump sgx_tstd from `3a43c5f` to `c8a5908` r=tomtau a=dependabot-preview[bot]

Bumps [sgx_tstd](https://github.com/baidu/rust-sgx-sdk) from `3a43c5f` to `c8a5908`.
<details>
<summary>Commits</summary>

- [`c8a5908`](apache/teaclave-sgx-sdk@c8a5908) Update Readme and add third party wiki link
- [`47c5815`](apache/teaclave-sgx-sdk@47c5815) Provides some info on third_party crates
- [`65f8a49`](apache/teaclave-sgx-sdk@65f8a49) Add Fedora 27 docker support
- See full diff in [compare view](apache/teaclave-sgx-sdk@3a43c5f...c8a5908)
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Co-authored-by: Devashish Dixit <devashish@crypto.com>
Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>