Bump to v0.3.0-alpha.7

Author: tesaguri

Cargo.toml

@@ -1,12 +1,12 @@
 [package]
 name = "pipitor"
-version = "0.3.0-alpha.6"
+version = "0.3.0-alpha.7"
 edition = "2018"
 authors = ["Daiki Mizukami <[email protected]>"]
 license = "AGPL-3.0-only"
 readme = "README.md"
 repository = "https://github.com/tesaguri/pipitor"
-documentation = "https://docs.rs/pipitor/0.3.0-alpha.6/pipitor/"
+documentation = "https://docs.rs/pipitor/0.3.0-alpha.7/pipitor/"
 description = """
 A Twitter bot that gathers, filters and Retweets Tweets automatically.
 """