Merge pull request parity-js#190 from parity-js/am-beta-snap

[BETA] Update electron-builder

Bump to v0.3.4

Use persistent storage (parity-js#177) (parity-js#186)

* Use persistent storage for webviews

* Update .gitlab-ci.yml

enable gitsync

* Retrieve dapp token internally

* Remove shell_requestNewToken RPC method. The token must be retrieved internally (by importing DappsRequestsStore in Parity UI), this way we can be sure that the appId is coming from a trusted source. The token, along with the appId, are now passed as query string parameters to the dapp (and to subsequent pages during in-dapp navigation)
* Use new version of @parity/api stripped of shell_requestNewToken methods that are now unused
* Use synchronous blocking methods in preload.js to maximize chances of web3/parity/ethereum objects being available directly to the dapp, before its own js executes.

Bump to 0.3.2 (parity-js#176)

Fix fetchParity(mainWindow) race condition (parity-js#173) (parity-js…

…#174)

* Fix fetchParity(mainWindow) race condition

* Lint

[BETA] Bump 0.3 to beta (parity-js#169)

* Bump 0.3 to beta

* Add end line

[STABLE] Bump Beta to Stable (parity-js#165)

* Require correct version of Parity

* Bump beta to stable

[Beta] Remove preload.js path verification (parity-js#139)

* Remove preload.js path verification

* Bump 0.2.7

[beta] Electron security (parity-js#135)

* Electron security

* Bump to 0.2.6

[stable] Remove preload.js path verification (parity-js#140)

* Remove preload.js path verification

* Bump v0.1.4