Bump prost-amino to v0.6

[tony-iqlusion]

No description provided.

[cargo-dep-bot]

This PR made the following dependency changes:

Removed Packages (Remaining versions in '()'):
	digest 0.7.6 (0.8.1, 0.9.0)
	generic-array 0.9.0 (0.12.3, 0.14.2)
	proc-macro2 0.4.30 (1.0.18)
	quote 0.6.13 (1.0.7)
	unicode-xid 0.1.0 (0.2.0)

Updated Packages:
	addr2line: 0.12.1 -> 0.12.2
	aho-corasick: 0.7.10 -> 0.7.13
	prost-amino: 0.5.0 -> 0.6.0
	prost-amino-derive: 0.5.0 -> 0.6.1
	serde: 1.0.112 -> 1.0.114
	serde_derive: 1.0.112 -> 1.0.114
	syn: 0.14.9 -> 1.0.33
	syn: 1.0.31 -> 1.0.33
	tendermint: 0.14.0 -> 0.14.1