Merge #33: bump to version 0.3.0

b96b876 bump to version 0.3.0 (Vladimir Fomene)

Pull request description:

ACKs for top commit:
  notmandatory:
    ACK b96b876

Tree-SHA512: 602cb7cded15e0f625c07921075865e9a27d648a25d30dbe4d3efaa4333636e23843a07e0004d5de35442dfa1390446f9dc9efed28d7fa930113fc72d72c5b25

Author: vladimirfomene

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "esplora-client"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2018"
 authors = ["Alekos Filini <alekos.filini@gmail.com>"]
 license = "MIT"